Priberam Labs at the NTCIR-15 SHINRA2020-ML: Classification Task
Priberam Labs at the NTCIR-15 SHINRA2020-ML: Classification Task
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Priberam 实验室在 NTCIR-15 SHINRA2020-ML:分类任务
DOI:
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发表时间:
2021
期刊:
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通讯作者:
Andre Lamurias
中科院分区:
文献类型:
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作者:
Rúben Cardoso;A. Mendes;Andre Lamurias
Wikipedia is an online encyclopedia available in 285 languages. It composes an extremely relevant Knowledge Base (KB), which could be leveraged by automatic systems for several purposes. However, the structure and organisation of such information are not prone to automatic parsing and understanding and it is, therefore, necessary to structure this knowledge. The goal of the current SHINRA2020-ML task is to leverage Wikipedia pages in order to categorise their corresponding entities across 268 hierarchical categories, belonging to the Extended Named Entity (ENE) ontology. In this work, we propose three distinct models based on the contextualised embeddings yielded by Multilingual BERT. We explore the performances of a linear layer with and without explicit usage of the ontology's hierarchy, and a Gated Recurrent Units (GRU) layer. We also test several pooling strategies to leverage BERT's embeddings and selection criteria based on the labels' scores. We were able to achieve good performance across a large variety of languages, including those not seen during the fine-tuning process (zero-shot languages).
DOI:
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发表时间:
2020
期刊:
影响因子:
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作者:
Satoshi Sekine;Masako Nomoto;Kouta Nakayama;Asuka Sumida;Koji Matsuda;and Maya Ando
通讯作者:
and Maya Ando