Razvan Bunescu

Also published as: Razvan C. Bunescu


2019

pdf bib
Context Dependent Semantic Parsing over Temporally Structured Data
Charles Chen | Razvan Bunescu
Proceedings of the 2019 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies, Volume 1 (Long and Short Papers)

We describe a new semantic parsing setting that allows users to query the system using both natural language questions and actions within a graphical user interface. Multiple time series belonging to an entity of interest are stored in a database and the user interacts with the system to obtain a better understanding of the entity’s state and behavior, entailing sequences of actions and questions whose answers may depend on previous factual or navigational interactions. We design an LSTM-based encoder-decoder architecture that models context dependency through copying mechanisms and multiple levels of attention over inputs and previous outputs. When trained to predict tokens using supervised learning, the proposed architecture substantially outperforms standard sequence generation baselines. Training the architecture using policy gradient leads to further improvements in performance, reaching a sequence-level accuracy of 88.7% on artificial data and 74.8% on real data.

2017

pdf bib
An Exploration of Data Augmentation and RNN Architectures for Question Ranking in Community Question Answering
Charles Chen | Razvan Bunescu
Proceedings of the Eighth International Joint Conference on Natural Language Processing (Volume 2: Short Papers)

The automation of tasks in community question answering (cQA) is dominated by machine learning approaches, whose performance is often limited by the number of training examples. Starting from a neural sequence learning approach with attention, we explore the impact of two data augmentation techniques on question ranking performance: a method that swaps reference questions with their paraphrases, and training on examples automatically selected from external datasets. Both methods are shown to lead to substantial gains in accuracy over a strong baseline. Further improvements are obtained by changing the model architecture to mirror the structure seen in the data.

2013

pdf bib
Coarse to Fine Grained Sense Disambiguation in Wikipedia
Hui Shen | Razvan Bunescu | Rada Mihalcea
Second Joint Conference on Lexical and Computational Semantics (*SEM), Volume 1: Proceedings of the Main Conference and the Shared Task: Semantic Textual Similarity

pdf bib
Multilingual Word Sense Disambiguation Using Wikipedia
Bharath Dandala | Rada Mihalcea | Razvan Bunescu
Proceedings of the Sixth International Joint Conference on Natural Language Processing

pdf bib
Sense Clustering Using Wikipedia
Bharath Dandala | Chris Hokamp | Rada Mihalcea | Razvan Bunescu
Proceedings of the International Conference Recent Advances in Natural Language Processing RANLP 2013

2012

pdf bib
Sense and Reference Disambiguation in Wikipedia
Hui Shen | Razvan Bunescu | Rada Mihalcea
Proceedings of COLING 2012: Posters

pdf bib
Adaptive Clustering for Coreference Resolution with Deterministic Rules and Web-Based Language Models
Razvan Bunescu
*SEM 2012: The First Joint Conference on Lexical and Computational Semantics – Volume 1: Proceedings of the main conference and the shared task, and Volume 2: Proceedings of the Sixth International Workshop on Semantic Evaluation (SemEval 2012)

pdf bib
Towards Building a Multilingual Semantic Network: Identifying Interlingual Links in Wikipedia
Bharath Dandala | Rada Mihalcea | Razvan Bunescu
*SEM 2012: The First Joint Conference on Lexical and Computational Semantics – Volume 1: Proceedings of the main conference and the shared task, and Volume 2: Proceedings of the Sixth International Workshop on Semantic Evaluation (SemEval 2012)

2011

pdf bib
Learning to Grade Short Answer Questions using Semantic Similarity Measures and Dependency Graph Alignments
Michael Mohler | Razvan Bunescu | Rada Mihalcea
Proceedings of the 49th Annual Meeting of the Association for Computational Linguistics: Human Language Technologies

2010

pdf bib
Learning the Relative Usefulness of Questions in Community QA
Razvan Bunescu | Yunfeng Huang
Proceedings of the 2010 Conference on Empirical Methods in Natural Language Processing

pdf bib
A Utility-Driven Approach to Question Ranking in Social QA
Razvan Bunescu | Yunfeng Huang
Proceedings of the 23rd International Conference on Computational Linguistics (Coling 2010)

2008

pdf bib
Learning with Probabilistic Features for Improved Pipeline Models
Razvan Bunescu
Proceedings of the 2008 Conference on Empirical Methods in Natural Language Processing

2007

pdf bib
Learning to Extract Relations from the Web using Minimal Supervision
Razvan Bunescu | Raymond Mooney
Proceedings of the 45th Annual Meeting of the Association of Computational Linguistics

2006

pdf bib
Using Encyclopedic Knowledge for Named entity Disambiguation
Razvan Bunescu | Marius Paşca
11th Conference of the European Chapter of the Association for Computational Linguistics

pdf bib
Integrating Co-occurrence Statistics with Information Extraction for Robust Retrieval of Protein Interactions from Medline
Razvan Bunescu | Raymond Mooney | Arun Ramani | Edward Marcotte
Proceedings of the HLT-NAACL BioNLP Workshop on Linking Natural Language and Biology

2005

pdf bib
A Shortest Path Dependency Kernel for Relation Extraction
Razvan Bunescu | Raymond Mooney
Proceedings of Human Language Technology Conference and Conference on Empirical Methods in Natural Language Processing

pdf bib
Using Biomedical Literature Mining to Consolidate the Set of Known Human Protein-Protein Interactions
Arun Ramani | Razvan Bunescu | Raymond Mooney | Edward Marcotte
Proceedings of the ACL-ISMB Workshop on Linking Biological Literature, Ontologies and Databases: Mining Biological Semantics

2004

pdf bib
Collective Information Extraction with Relational Markov Networks
Razvan Bunescu | Raymond Mooney
Proceedings of the 42nd Annual Meeting of the Association for Computational Linguistics (ACL-04)

2003

pdf bib
Associative Anaphora Resolution: A Web-Based Approach
Razvan Bunescu
Proceedings of the 2003 EACL Workshop on The Computational Treatment of Anaphora

2001

pdf bib
Text and Knowledge Mining for Coreference Resolution
Sanda M. Harabagiu | Razvan C. Bunescu | Steven J. Maiorano
Second Meeting of the North American Chapter of the Association for Computational Linguistics