ACL-IJCNLP 2015 Sponsors c�2015 The Association for Computational Linguistics Order print-on-demand copies from: Curran Associates 57 Morehouse Lane Red Hook, New York 12571 USA Tel: +1-845-758-0400 Fax: +1-845-758-2633 curran@proceedings.com ISBN 978-1-941643-69-3 ii Introduction The WNUT 2015 workshop focuses on a core set of natural language processing tasks on top of noisy user-generated text, such as that found on social media, web forums and online reviews. Recent years have seen a significant increase of interest in these areas. The internet has democratized content creation leading to an explosion of informal user-generated text, publicly available in electronic format, motivating the need for NLP on noisy text to enable new data analytics applications. The workshop is an opportunity to bring together researchers interested in noisy text with different backgrounds and encourage crossover. The workshop this year features two shared tasks, (a) Text Normalization and (b) Twitter Named Entity Recognition, to facilitate comparison of different approaches and help advance the state of the art. Because this is a fast-moving area, there is a lack of standardized datasets, and papers published in the same year may not compare against each other. By organizing these shared tasks we hope to help develop standardized evaluations and promote research on NLP in noisy text. The program this year includes 8 papers in the main track, 8 system description papers in the Twitter Named Entity Recognition track, and 9 system description papers in the Text Normalization track. All the papers are presented as short talks and as well as posters. There are also 4 invited speakers, Tim Baldwin, Brendan O’Connor, Anders Søgaard and Joel Tetreault, with each of their talks covering a different aspect of NLP for user-generated text. We would like to thank the Program Committee members who reviewed the papers this year. We would also like to thank the workshop participants. Last, a word of thanks also goes to our two sponsors: Microsoft Research and IBM Research. Wei Xu, Bo Han and Alan Ritter Co-Organizers iii

Organizers: Wei Xu (University of Pennsylvania) Bo Han (IBM Research) Alan Ritter (The Ohio State University) Program Committee: David Bamman (Carnegie Mellon University) Kalina Bontcheva (University of Sheffield) Claire Cardie (Cornell University) Colin Cherry (National Research Council Canada) Grzegorz Chrupała (Tilburg University) Leon Derczynski (University of Sheffield) Jacob Eisenstein (Georgia Institute of Technology) Jennifer Foster (Dublin City University) Eric Fosler-Lussier (The Ohio State University) Kevin Gimpel (Toyota Technological Institute at Chicago) Weiwei Guo (Columbia University) Dirk Hovy (University of Copenhagen) Jing Jiang (Singapore Management University) Emre Kiciman (Microsoft Research) Wang Ling (Carnegie Mellon University) Xiaohua Liu (University of Montreal) Preslav Nakov (Qatar Computing Research Institute) Miles Osborne (Bloomberg) Kristen Parton (Facebook) Ellie Pavlick (University of Pennsylvania) Daniel Preo¸tiuc-Pietro (University of Pennsylvania) Roi Reichart (Technion-IIT) Alla Rozovskaya (Columbia University) Nathan Schneider (University of Edinburgh) Djamé Seddah (University Paris-Sorbonne) Richard Sproat (Google) Maosong Sun (Tsinghua University) Oren Tsur (Harvard University) Benjamin Van Durme (Johns Hopkins University) Svitlana Volkova (Johns Hopkins University) Lu Wang (Cornell University) Jun-Ming Xu (University of Wisconsin-Madison) Xiaojin Zhu (University of Wisconsin-Madison) Invited Speakers: Tim Baldwin (The University of Melbourne) Brendan O’Connor (University of Massachusetts Amherst) Anders Søgaard (University of Copenhagen) Joel Tetreault (Yahoo! Research) v Table of Contents Minority Language Twitter: Part-of-Speech Tagging and Analysis of Irish Tweets Teresa Lynn, Kevin Scannell and Eimear Maguire 1 Challenges of studying and processing dialects in social media Anna Jørgensen, Dirk Hovy and Anders Søgaard 9 Toward Tweets Normalization Using Maximum Entropy Mohammad Arshi Saloot, Norisma Idris, Liyana Shuib, Ram Gopal Raj and AiTi Aw 19 Five Shades of Noise: Analyzing Machine Translation Errors in User-Generated Text Marlies van der Wees, Arianna Bisazza and Christof Monz 28 A Normalizer for UGC in Brazilian Portuguese Magali Sanches Duran, Maria das Graças Volpe Nunes and Lucas Avanço 38 USFD: Twitter NER with Drift Compensation and Linked Data Leon Derczynski, Isabelle Augenstein and Kalina Bontcheva 48 NRC: Infused Phrase Vectors for Named Entity Recognition in Twitter Colin Cherry, Hongyu Guo and Chengbi Dai 54 IITP: Multiobjective Differential Evolution based Twitter Named Entity Recognition Md Shad Akhtar, Utpal Kumar Sikdar and Asif Ekbal 61 Data Adaptation for Named Entity Recognition on Tweets with Features-Rich CRF Tian Tian, Marco Dinarelli and Isabelle Tellier 68 Hallym: Named Entity Recognition on Twitter with Word Representation Eun-Suk Yang and Yu-Seop Kim 72 IHS_RD: Lexical Normalization for English Tweets Dmitry Supranovich and Viachaslau Patsepnia 78 Bekli:A Simple Approach to Twitter Text Normalization. Russell Beckley 82 NCSU-SAS-Ning: Candidate Generation and Feature Engineering for Supervised Lexical Normalization Ning Jin 87 DCU-ADAPT: Learning Edit Operations for Microblog Normalisation with the Generalised Perceptron Joachim Wagner and Jennifer Foster 93 LYSGROUP: Adapting a Spanish microtext normalization system to English. Yerai Doval Mosquera, Jesús Vilares and Carlos Gómez-Rodríguez 99 IITP: Hybrid Approach for Text Normalization in Twitter Md Shad Akhtar, Utpal Kumar Sikdar and Asif Ekbal 106 NCSU_SAS_WOOKHEE: A Deep Contextual Long-Short Term Memory Model for Text Normalization Wookhee Min and Bradford Mott 111 vii USZEGED: Correction Type-sensitive Normalization of English Tweets Using Efficiently Indexed n-gram Statistics Gábor Berend and Ervin Tasnádi 120 Shared Tasks of the 2015 Workshop on Noisy User-generated Text: Twitter Lexical Normalization and Named Entity Recognition Timothy Baldwin, Marie-Catherine de Marneffe, Bo Han, Young-Bum Kim, Alan Ritter and Wei Xu 126 Enhancing Named Entity Recognition in Twitter Messages Using Entity Linking Ikuya Yamada, Hideaki Takeda and Yoshiyasu Takefuji 136 Improving Twitter Named Entity Recognition using Word Representations Zhiqiang Toh, Bin Chen and Jian Su 141 Multimedia Lab @ ACL WNUT NER Shared Task: Named Entity Recognition for Twitter Microposts using Distributed Word Representations Fréderic Godin, Baptist Vandersmissen, Wesley De Neve and Rik Van de Walle 146 NCSU_SAS_SAM: Deep Encoding and Reconstruction for Normalization of Noisy Text Samuel Leeman-Munk, James Lester and James Cox 154 viii Conference Program Friday, July 31, 2015 9:00–10:30 Invited Talks 9:00–9:45 Text Mining of Social Media: Going beyond the Text and Only the Text Tim Baldwin 9:45–10:30 Where is Language? Anders Søgaard 10:30–11:00 Coffee Break 11:00–12:30 Long Papers and Abstracts 11:00–11:15 Learning finite state word representations for unsupervised Twitter adaptation of POS taggers Julie Wulff and Anders Søgaard 11:15–11:30 Towards POS Tagging for Arabic Tweets Fahad Albogamy and Allan Ramasy 11:30–11:45 Minority Language Twitter: Part-of-Speech Tagging and Analysis of Irish Tweets Teresa Lynn, Kevin Scannell and Eimear Maguire 11:45–11:00 Challenges of studying and processing dialects in social media Anna Jørgensen, Dirk Hovy and Anders Søgaard 12:00–12:15 Toward Tweets Normalization Using Maximum Entropy Mohammad Arshi Saloot, Norisma Idris, Liyana Shuib, Ram Gopal Raj and AiTi Aw 12:15–12:30 Five Shades of Noise: Analyzing Machine Translation Errors in User-Generated Text Marlies van der Wees, Arianna Bisazza and Christof Monz ix Friday, July 31, 2015 (continued) 12:30–14:00 Poster Session and Lunch Learning finite state word representations for unsupervised Twitter adaptation of POS taggers Julie Wulff and Anders Søgaard Towards POS Tagging for Arabic Tweets Fahad Albogamy and Allan Ramasy Minority Language Twitter: Part-of-Speech Tagging and Analysis of Irish Tweets Teresa Lynn, Kevin Scannell and Eimear Maguire Challenges of studying and processing dialects in social media Anna Jørgensen, Dirk Hovy and Anders Søgaard Toward Tweets Normalization Using Maximum Entropy Mohammad Arshi Saloot, Norisma Idris, Liyana Shuib, Ram Gopal Raj and AiTi Aw Five Shades of Noise: Analyzing Machine Translation Errors in User-Generated Text Marlies van der Wees, Arianna Bisazza and Christof Monz A Normalizer for UGC in Brazilian Portuguese Magali Sanches Duran, Maria das Graças Volpe Nunes and Lucas Avanço USFD: Twitter NER with Drift Compensation and Linked Data Leon Derczynski, Isabelle Augenstein and Kalina Bontcheva Enhancing Named Entity Recognition in Twitter Messages Using Entity Linking Ikuya Yamada, Hideaki Takeda and Yoshiyasu Takefuji Improving Twitter Named Entity Recognition using Word Representations Zhiqiang Toh, Bin Chen and Jian Su NRC: Infused Phrase Vectors for Named Entity Recognition in Twitter Colin Cherry, Hongyu Guo and Chengbi Dai IITP: Multiobjective Differential Evolution based Twitter Named Entity Recognition Md Shad Akhtar, Utpal Kumar Sikdar and Asif Ekbal x Friday, July 31, 2015 (continued) Multimedia Lab @ ACL WNUT NER Shared Task: Named Entity Recognition for Twitter Microposts using Distributed Word Representations Fréderic Godin, Baptist Vandersmissen, Wesley De Neve and Rik Van de Walle Data Adaptation for Named Entity Recognition on Tweets with Features-Rich CRF Tian Tian, Marco Dinarelli and Isabelle Tellier Hallym: Named Entity Recognition on Twitter with Word Representation Eun-Suk Yang and Yu-Seop Kim IHS_RD: Lexical Normalization for English Tweets Dmitry Supranovich and Viachaslau Patsepnia Bekli:A Simple Approach to Twitter Text Normalization. Russell Beckley NCSU-SAS-Ning: Candidate Generation and Feature Engineering for Supervised Lexical Normalization Ning Jin DCU-ADAPT: Learning Edit Operations for Microblog Normalisation with the Generalised Perceptron Joachim Wagner and Jennifer Foster LYSGROUP: Adapting a Spanish microtext normalization system to English. Yerai Doval Mosquera, Jesús Vilares and Carlos Gómez-Rodríguez IITP: Hybrid Approach for Text Normalization in Twitter Md Shad Akhtar, Utpal Kumar Sikdar and Asif Ekbal NCSU_SAS_WOOKHEE: A Deep Contextual Long-Short Term Memory Model for Text Normalization

Wookhee Min and Bradford Mott NCSU_SAS_SAM: Deep Encoding and Reconstruction for Normalization of Noisy Text Samuel Leeman-Munk, James Lester, and James Cox USZEGED: Correction Type-sensitive Normalization of English Tweets Using Effi- ciently Indexed n-gram Statistics Gábor Berend and Ervin Tasnádi xi Friday, July 31, 2015 (continued) 14:00–15:30 Shared Task Session 14:00–14:30 Shared Tasks of the 2015 Workshop on Noisy User-generated Text: Twitter Lexical Normalization and Named Entity Recognition Timothy Baldwin, Marie-Catherine de Marneffe, Bo Han, Young-Bum Kim, Alan Ritter and Wei Xu 14:30–14:45 Enhancing Named Entity Recognition in Twitter Messages Using Entity Linking Ikuya Yamada, Hideaki Takeda and Yoshiyasu Takefuji 14:45–15:00 Improving Twitter Named Entity Recognition using Word Representations Zhiqiang Toh, Bin Chen and Jian Su 15:00–15:15 Multimedia Lab @ ACL WNUT NER Shared Task: Named Entity Recognition for Twitter Microposts using Distributed Word Representations Fréderic Godin, Baptist Vandersmissen, Wesley De Neve and Rik Van de Walle 15:15–15:30 NCSU_SAS_SAM: Deep Encoding and Reconstruction for Normalization of Noisy Text Samuel Leeman-Munk, James Lester and James Cox 15:30–16:00 Coffee Break 16:00–17:30 Invited Talks 16:00–16:45 Automated Grammatical Error Correction for Language Learners: Where are we, and where do we go from there? Joel Tetreault 16:45–17:30 Are Minority Dialects "Noisy Text"?: Implications of Social and Linguistic Diversity for Social Media NLP Brendan O’Connor xii ACL-IJCNLP 2015 ACL 2015 Workshop on Noisy User-generated Text Proceedings of the Workshop July 31,

Beijing, China

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Tel: +1-845-758-0400 Fax: +1-845-758-2633 curran@proceedings.com ISBN 978-1-941643-69-3 ii Wookhee Min Bradford Mott Min, Mott, Wookhee Min and Bradford Mott NCSU_SAS_SAM: Deep Encoding and Reconstruction for Normalization of Noisy Text Samuel Leeman-Munk James Lester James Cox Leeman-Munk, Lester, Cox, Samuel Leeman-Munk, James Lester, and James Cox USZEGED: Correction Type-sensitive Normalization of English Tweets Using Efficiently Indexed n-gram Statistics Gábor Berend and Ervin Tasnádi xi Gábor Berend and Ervin Tasnádi xi Friday 2015 (continued) 14:00–15:30 Shared Task Session Friday, 2015 Friday, July 31, 2015 (continued) 14:00–15:30 Shared Task Session 14:00–14:30 Shared Tasks of the 2015 Workshop on Noisy User-generated Text: Twitter Lexical Normalization and Named Entity Recognition 14:00–14:30 Shared Tasks of the 2015 Workshop on Noisy User-generated Text: Twitter Lexical Normalization and Named Entity Recognition Timothy Baldwin Bo Han, Young-Bum Kim, Alan Ritter and Wei Xu Baldwin, Timothy Baldwin, Marie-Catherine de Marneffe, Bo Han, Young-Bum Kim, Alan Ritter and Wei Xu 14:30–14:45 Enhancing Named Entity Recognition in Twitter Messages Using Entity Linking Ikuya Yamada, Hideaki Takeda and Yoshiyasu Takefuji Jian Su 14:45–15:00 Improving Twitter Named Entity Recognition using Word Representations Zhiqiang Toh, Bin Chen and Jian Su Baptist Vandersmissen, Wesley De Neve and Rik Van de Walle 15:00–15:15 Multimedia Lab @ ACL WNUT NER Shared Task: Named Entity Recognition for Twitter Microposts using Distributed Word Representations Fréderic Godin, Baptist Vandersmissen, Wesley De Neve and Rik Van de Walle 15:15–15:30 NCSU_SAS_SAM: Deep Encoding and Reconstruction for Normalization of Noisy Text Samuel Leeman-Munk James Lester James Cox 15:30–16:00 Coffee Break 16:00–17:30 Invited Talks Leeman-Munk, Lester, James, Samuel Leeman-Munk, James Lester and James Cox 15:30–16:00 Coffee Break 16:00–17:30 Invited Talks 16:00–16:45 Automated Grammatical Error Correction for Language Learners: Where are we, and where do we go from there? Joel Tetreault Tetreault, Joel Tetreault 16:45–17:30 Are Minority Dialects "Noisy Text"?: Implications of Social and Linguistic Diversity for Social Media NLP Brendan O’Connor Brendan O’Connor