Maksim Tkachenko


2023

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Sakura at SemEval-2023 Task 2: Data Augmentation via Translation
Alberto Poncelas | Maksim Tkachenko | Ohnmar Htun
Proceedings of the 17th International Workshop on Semantic Evaluation (SemEval-2023)

We demonstrate a simple yet effective approach to augmenting training data for multilingual named entity recognition using translations. The named entity spans from the original sentences are transferred to translations via word alignment and then filtered with the baseline recognizer. The proposed approach outperforms the baseline XLM-Roberta on the multilingual dataset.

2018

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Searching for the X-Factor: Exploring Corpus Subjectivity for Word Embeddings
Maksim Tkachenko | Chong Cher Chia | Hady Lauw
Proceedings of the 56th Annual Meeting of the Association for Computational Linguistics (Volume 1: Long Papers)

We explore the notion of subjectivity, and hypothesize that word embeddings learnt from input corpora of varying levels of subjectivity behave differently on natural language processing tasks such as classifying a sentence by sentiment, subjectivity, or topic. Through systematic comparative analyses, we establish this to be the case indeed. Moreover, based on the discovery of the outsized role that sentiment words play on subjectivity-sensitive tasks such as sentiment classification, we develop a novel word embedding SentiVec which is infused with sentiment information from a lexical resource, and is shown to outperform baselines on such tasks.

2015

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A Convolution Kernel Approach to Identifying Comparisons in Text
Maksim Tkachenko | Hady Lauw
Proceedings of the 53rd Annual Meeting of the Association for Computational Linguistics and the 7th International Joint Conference on Natural Language Processing (Volume 1: Long Papers)