$\mu$PLAN: Summarizing using a Content Plan as Cross-Lingual Bridge

• URL: http://arxiv.org/abs/2305.14205v2
• Date: Wed, 31 Jan 2024 13:28:58 GMT
• Title: $\mu$PLAN: Summarizing using a Content Plan as Cross-Lingual Bridge
• Authors: Fantine Huot, Joshua Maynez, Chris Alberti, Reinald Kim Amplayo, Priyanka Agrawal, Constanza Fierro, Shashi Narayan, Mirella Lapata
• Abstract summary: Cross-lingual summarization consists of generating a summary in one language given an input document in a different language. This work presents $mu$PLAN, an approach to cross-lingual summarization that uses an intermediate planning step as a cross-lingual bridge.
• Score: 72.64847925450368
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Cross-lingual summarization consists of generating a summary in one language given an input document in a different language, allowing for the dissemination of relevant content across speakers of other languages. The task is challenging mainly due to the paucity of cross-lingual datasets and the compounded difficulty of summarizing and translating. This work presents $\mu$PLAN, an approach to cross-lingual summarization that uses an intermediate planning step as a cross-lingual bridge. We formulate the plan as a sequence of entities capturing the summary's content and the order in which it should be communicated. Importantly, our plans abstract from surface form: using a multilingual knowledge base, we align entities to their canonical designation across languages and generate the summary conditioned on this cross-lingual bridge and the input. Automatic and human evaluation on the XWikis dataset (across four language pairs) demonstrates that our planning objective achieves state-of-the-art performance in terms of informativeness and faithfulness. Moreover, $\mu$PLAN models improve the zero-shot transfer to new cross-lingual language pairs compared to baselines without a planning component.

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