TMR: Evaluating NER Recall on Tough Mentions

Jingxuan Tu, Constantine Lignos


Abstract
We propose the Tough Mentions Recall (TMR) metrics to supplement traditional named entity recognition (NER) evaluation by examining recall on specific subsets of ”tough” mentions: unseen mentions, those whose tokens or token/type combination were not observed in training, and type-confusable mentions, token sequences with multiple entity types in the test data. We demonstrate the usefulness of these metrics by evaluating corpora of English, Spanish, and Dutch using five recent neural architectures. We identify subtle differences between the performance of BERT and Flair on two English NER corpora and identify a weak spot in the performance of current models in Spanish. We conclude that the TMR metrics enable differentiation between otherwise similar-scoring systems and identification of patterns in performance that would go unnoticed from overall precision, recall, and F1.
Anthology ID:
2021.eacl-srw.21
Volume:
Proceedings of the 16th Conference of the European Chapter of the Association for Computational Linguistics: Student Research Workshop
Month:
April
Year:
2021
Address:
Online
Venue:
EACL
SIG:
Publisher:
Association for Computational Linguistics
Note:
Pages:
155–163
Language:
URL:
https://aclanthology.org/2021.eacl-srw.21
DOI:
10.18653/v1/2021.eacl-srw.21
Bibkey:
Cite (ACL):
Jingxuan Tu and Constantine Lignos. 2021. TMR: Evaluating NER Recall on Tough Mentions. In Proceedings of the 16th Conference of the European Chapter of the Association for Computational Linguistics: Student Research Workshop, pages 155–163, Online. Association for Computational Linguistics.
Cite (Informal):
TMR: Evaluating NER Recall on Tough Mentions (Tu & Lignos, EACL 2021)
Copy Citation:
PDF:
https://aclanthology.org/2021.eacl-srw.21.pdf
Data
CoNLL 2002CoNLL-2003IPM NEL