Low-Resource Sequence Labeling via Unsupervised Multilingual Contextualized Representations (D19-1)
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| Challenge: | Existing approaches to cross-lingual sequence labeling require bilingual resources and require linguistic knowledge. |
| Approach: | They propose a multilingual language model with deep semantic Alignment to generate language-independent representations for cross-lingual sequence labeling. |
| Outcome: | The proposed model achieves state-of-the-art NER and POS performance across European languages and on distant language pairs such as English and Chinese. |
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Small and Practical BERT Models for Sequence Labeling (D19-1)
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| Challenge: | Existing models for morphosyntactic tagging have focused on building separate models for each language or for a small group of related languages. |
| Approach: | They propose a scheme to train a single multilingual sequence labeling model that is small and fast enough to run on a CPU. |
| Outcome: | The proposed model outperforms state-of-the-art models on low-resource languages and low-level models on codemixed inputs. |
A Multi-lingual Multi-task Architecture for Low-resource Sequence Labeling (P18-1)
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| Challenge: | Existing studies have shown that multi-task learning can boost the performance of related tasks such as MT and abstractive text summarization. |
| Approach: | They propose a multi-lingual multi-task architecture to develop supervised models with a minimal amount of labeled data for sequence labeling. |
| Outcome: | The proposed architecture achieves 4.3%-50.5% absolute gains compared to mono-lingual model . the proposed model is particularly effective in low-resource settings . |
Multilingual unsupervised sequence segmentation transfers to extremely low-resource languages (2022.acl-long)
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| Challenge: | Unsupervised sequence segmentation is a key component of low-resource languages where there is little or no gold-standard data on which to train supervised models. |
| Approach: | They propose to pre-train a Masked Segmental Language Model multilingually to achieve unsupervised segmentation performance in extremely low-resource languages. |
| Outcome: | The proposed model outperforms a monolingual model and a pre-trained model on Quechua in 6/10 settings. |
Sequence Tagging with Contextual and Non-Contextual Subword Representations: A Multilingual Evaluation (P19-1)
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| Challenge: | Pretrained contextual and non-contextual subword embeddings are available in over 250 languages, allowing massively multilingual NLP. |
| Approach: | They compare pretrained contextual and non-contextual subword embeddings with a contextual representation method, namely BERT, on multilingual named entity recognition and part-of-speech tagging. |
| Outcome: | The proposed method outperforms non-contextual embeddings on multilingual named entity recognition and part-of-speech tagging. |
Model and Data Transfer for Cross-Lingual Sequence Labelling in Zero-Resource Settings (2022.findings-emnlp)
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| Challenge: | Existing studies have proposed data-based cross-lingual transfer as an effective technique for cross-linguistic sequence labelling, but they have failed to perform well. |
| Approach: | They propose to use data-based cross-lingual transfer to train supervised models from a source language to unlabelled target languages. |
| Outcome: | The proposed techniques outperform data-based cross-lingual transfer approaches in a zero-shot setting. |
Improving Low-Resource Languages in Pre-Trained Multilingual Language Models (2022.emnlp-main)
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| Challenge: | Pre-trained multilingual language models are the foundation of many NLP approaches, but are often not well-supported by these models due to small available monolingual corpora. |
| Approach: | They propose an unsupervised approach to improve cross-lingual representations of low-resource languages by bootstrapping word translation pairs from monolingual corpora and using them to improve language alignment. |
| Outcome: | The proposed approach improves cross-lingual representations on low-resource languages using word retrieval and zero-shot named entity recognition. |
Unsupervised Cross-Lingual Representation Learning (P19-4)
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| Challenge: | a comprehensive survey of cutting-edge weakly-supervised and unsupervised cross-lingual word representations is presented . |
| Approach: | This tutorial provides a comprehensive survey of recent work on weakly-supervised and unsupervised cross-lingual word representations. |
| Outcome: | This tutorial provides a comprehensive survey of cutting-edge weakly-supervised and unsupervised word representations. |
BinaryAlign: Word Alignment as Binary Sequence Labeling (2024.acl-long)
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| Challenge: | State-of-the-art word alignment training methods require a different class depending on the availability of gold data for a particular language pair. |
| Approach: | They propose a novel word alignment technique based on binary sequence labeling that outperforms existing approaches in both scenarios. |
| Outcome: | The proposed method outperforms existing models on non-English language pairs and performs stratified error analysis over alignment error type. |
CROP: Zero-shot Cross-lingual Named Entity Recognition with Multilingual Labeled Sequence Translation (2022.findings-emnlp)
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Jian Yang, Shaohan Huang, Shuming Ma, Yuwei Yin, Li Dong, Dongdong Zhang, Hongcheng Guo, Zhoujun Li, Furu Wei
| Challenge: | Named entity recognition (NER) suffers from the scarcity of annotated training data, especially for low-resource languages without labeled data. |
| Approach: | They propose a cross-lingual entity projection framework to enable zero-shot cross-linguistic NER with the help of a multilingual labeled sequence translation model. |
| Outcome: | The proposed method outperforms the baseline method on two benchmarks by a large margin of +3 7 F1 scores and achieves state-of-the-art performance. |
Unsupervised Cross-Lingual Part-of-Speech Tagging for Truly Low-Resource Scenarios (2020.emnlp-main)
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| Challenge: | a limited set of translations into one or more high-resource languages are available for POS tagging . a bi-LSTM architecture that uses contextualized word embeddings improves performance . |
| Approach: | They propose an unsupervised cross-lingual transfer approach for part-of-speech tagging . they use the Bible as parallel data to learn POS taggers for target languages . |
| Outcome: | The proposed approach improves accuracy on 12 diverse languages . the Bible is used as a parallel corpus for the study . |