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Glavas, Goran (6)
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Hits 1 – 6 of 6
1
Probing Pretrained Language Models for Lexical Semantics ...
Vulic, Ivan
;
Ponti, Edoardo
;
Litschko, Robert
. - : Apollo - University of Cambridge Repository, 2020
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2
Probing Pretrained Language Models for Lexical Semantics
Vulic, Ivan
;
Ponti, Edoardo
;
Litschko, Robert
;
Glavas, Goran
;
Korhonen, Anna-Leena
. - : Association for Computational Linguistics, 2020. : Proceedings of the Conference on Empirical Methods in Natural Language Processing (EMNLP 2020), 2020
Abstract:
The success of large pretrained language models (LMs) such as BERT and RoBERTa has sparked interest in probing their representations, in order to unveil what types of knowledge they implicitly capture. While prior research focused on morphosyntactic, semantic, and world knowledge, it remains unclear to which extent LMs also derive lexical type-level knowledge from words in context. In this work, we present a systematic empirical analysis across six typologically diverse languages and five different lexical tasks, addressing the following questions: 1) How do different lexical knowledge extraction strategies (monolingual versus multilingual source LM, out-of-context versus in-context encoding, inclusion of special tokens, and layer-wise averaging) impact performance? How consistent are the observed effects across tasks and languages? 2) Is lexical knowledge stored in few parameters, or is it scattered throughout the network? 3) How do these representations fare against traditional static word vectors in lexical tasks? 4) Does the lexical information emerging from independently trained monolingual LMs display latent similarities? Our main results indicate patterns and best practices that hold universally, but also point to prominent variations across languages and tasks. Moreover, we validate the claim that lower Transformer layers carry more type-level lexical knowledge, but also show that this knowledge is distributed across multiple layers.
URL:
https://www.repository.cam.ac.uk/handle/1810/315105
https://doi.org/10.17863/CAM.62212
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3
Towards Instance-Level Parser Selection for Cross-Lingual Transfer of Dependency Parsers
Glavas, Goran
;
Agic, Zeljko
;
Vulic, Ivan
. - : International Committee on Computational Linguistics, 2020. : https://www.aclweb.org/anthology/2020.coling-main.345, 2020. : Proceedings of the 28th International Conference on Computational Linguistics (COLING 2020), 2020
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4
How to (Properly) Evaluate Cross-Lingual Word Embeddings: On Strong Baselines, Comparative Analyses, and Some Misconceptions ...
Glavas, Goran
;
Litschko, Robert
;
Ruder, Sebastian
. - : arXiv, 2019
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5
Unsupervised Cross-Lingual Information Retrieval Using Monolingual Data Only ...
Litschko, Robert
;
Glavas, Goran
;
Ponzetto, Simone Paolo
. - : Apollo - University of Cambridge Repository, 2018
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6
Unsupervised Cross-Lingual Information Retrieval Using Monolingual Data Only
Litschko, Robert
;
Glavas, Goran
;
Ponzetto, Simone Paolo
. - : ACM, 2018. : ACM/SIGIR PROCEEDINGS 2018, 2018
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