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Zero-Resource Cross-Lingual Named Entity Recognition

AAAI 2020 · Label-efficient and robust learning › Recognition and long-tail · approach: Multilingual language representation pretraining · 45 citations (OpenAlex)

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Measured effects reported in the paper

What was changedWhereMeasuredEffect
Add augmented fine-tuning with source guidance and target pseudo-labels to Cross-Shared (ablation)Cross-lingual NER · English→Spanish, Dutch, German, Arabic, FinnishF1: +2.43, +2.21, +6.14, +7.1, +5.73 F1Helped
Share forward and backward LSTM weights (ablation)Cross-Word · English→SpanishF1: +1.73Helped
Share forward and backward LSTM weights (ablation)Cross-Word · English→DutchF1: +0.71Helped
Share forward and backward LSTM weights (ablation)Cross-Word · English→ArabicF1: 28.28 ± 1.61 -> 23.32 ± 0.76Hurt
Share forward and backward LSTM weights (ablation)Cross-Word · English→German and English→FinnishF1No clear effect
Use pretrained source character embeddings (ablation)Cross-lingual NER · English→Spanish, Dutch, FinnishF1Helped
Use pretrained source character embeddings (ablation)Cross-lingual NER · English→ArabicF1Hurt
Use pretrained source character embeddings (ablation)Cross-lingual NER · English→GermanF1Hurt
Replace monolingual word embeddings with random word embeddings (ablation)Source-Mono · Cross-lingual target NERF1Helped
Use BPE subword units instead of shared character embeddings (ablation)Cross-lingual NER · Cross-lingual target NERF1No clear effect
Increase the maximum sentence length used for pseudo-label training (ablation)Cross-Augmented · Target-language NERcorrectly tagged sentencesHurt

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