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    <abstract>Lexical semantic change detection (also known as semantic shift tracing) is a task of identifying words that have changed their meaning over time. Unsupervised semantic shift tracing, focal point of SemEval2020, is particularly challenging. Given the unsupervised setup, in this work, we propose to identify clusters among different occurrences of each target word, considering these as representatives of different word meanings. As such, disagreements in obtained clusters naturally allow to quantify the level of semantic shift per each target word in four target languages. To leverage this idea, clustering is performed on contextualized (BERT-based) embeddings of word occurrences. The obtained results show that our approach performs well both measured separately (per language) and overall, where we surpass all provided SemEval baselines.</abstract>
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%0 Conference Proceedings
%T SST-BERT at SemEval-2020 Task 1: Semantic Shift Tracing by Clustering in BERT-based Embedding Spaces
%A Kanjirangat, Vani
%A Mitrovic, Sandra
%A Antonucci, Alessandro
%A Rinaldi, Fabio
%S Proceedings of the Fourteenth Workshop on Semantic Evaluation
%D 2020
%8 dec
%I International Committee for Computational Linguistics
%C Barcelona (online)
%F kanjirangat-etal-2020-sst
%X Lexical semantic change detection (also known as semantic shift tracing) is a task of identifying words that have changed their meaning over time. Unsupervised semantic shift tracing, focal point of SemEval2020, is particularly challenging. Given the unsupervised setup, in this work, we propose to identify clusters among different occurrences of each target word, considering these as representatives of different word meanings. As such, disagreements in obtained clusters naturally allow to quantify the level of semantic shift per each target word in four target languages. To leverage this idea, clustering is performed on contextualized (BERT-based) embeddings of word occurrences. The obtained results show that our approach performs well both measured separately (per language) and overall, where we surpass all provided SemEval baselines.
%R 10.18653/v1/2020.semeval-1.26
%U https://aclanthology.org/2020.semeval-1.26
%U https://doi.org/10.18653/v1/2020.semeval-1.26
%P 214-221

Markdown (Informal)

[SST-BERT at SemEval-2020 Task 1: Semantic Shift Tracing by Clustering in BERT-based Embedding Spaces](https://aclanthology.org/2020.semeval-1.26) (Kanjirangat et al., SemEval 2020)

• SST-BERT at SemEval-2020 Task 1: Semantic Shift Tracing by Clustering in BERT-based Embedding Spaces (Kanjirangat et al., SemEval 2020)

ACL

• Vani Kanjirangat, Sandra Mitrovic, Alessandro Antonucci, and Fabio Rinaldi. 2020. SST-BERT at SemEval-2020 Task 1: Semantic Shift Tracing by Clustering in BERT-based Embedding Spaces. In Proceedings of the Fourteenth Workshop on Semantic Evaluation, pages 214–221, Barcelona (online). International Committee for Computational Linguistics.