CroCoSum: A Benchmark Dataset for Cross-Lingual Code-Switched Summarization

• URL: http://arxiv.org/abs/2303.04092v2
• Date: Thu, 23 May 2024 12:26:22 GMT
• Title: CroCoSum: A Benchmark Dataset for Cross-Lingual Code-Switched Summarization
• Authors: Ruochen Zhang, Carsten Eickhoff,
• Abstract summary: Given the rareness of naturally occurring CLS resources, the majority of datasets are forced to rely on translation. This restricts our ability to observe naturally occurring CLS pairs that capture organic diction, including instances of code-switching. We introduce CroCoSum, a dataset of cross-lingual code-switched summarization of technology news.
• Score: 25.182666420286132
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Cross-lingual summarization (CLS) has attracted increasing interest in recent years due to the availability of large-scale web-mined datasets and the advancements of multilingual language models. However, given the rareness of naturally occurring CLS resources, the majority of datasets are forced to rely on translation which can contain overly literal artifacts. This restricts our ability to observe naturally occurring CLS pairs that capture organic diction, including instances of code-switching. This alteration between languages in mid-message is a common phenomenon in multilingual settings yet has been largely overlooked in cross-lingual contexts due to data scarcity. To address this gap, we introduce CroCoSum, a dataset of cross-lingual code-switched summarization of technology news. It consists of over 24,000 English source articles and 18,000 human-written Chinese news summaries, with more than 92% of the summaries containing code-switched phrases. For reference, we evaluate the performance of existing approaches including pipeline, end-to-end, and zero-shot methods. We show that leveraging existing CLS resources as a pretraining step does not improve performance on CroCoSum, indicating the limited generalizability of current datasets. Finally, we discuss the challenges of evaluating cross-lingual summarizers on code-switched generation through qualitative error analyses.

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