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Sticking to the Facts: Confident Decoding for Faithful Data-to-Text Generation
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We address the issue of hallucination in data-to-text generation, i.e., reducing the generation of text that is unsupported by the source. We conjecture that hallucination can be caused by an encoder-decoder model generating content phrases without attending to the source; so we propose a confidence score to ensure that the model attends to the source whenever necessary, as well as a variational Bayes training framework that can learn the score from data. Experiments on the WikiBio (Lebretet al., 2016) dataset show that our approach is more faithful to the source than existing state-of-the-art approaches, according to both PARENT score (Dhingra et al., 2019) and human evaluation. We also report strong results on the WebNLG (Gardent et al., 2017) dataset.
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An Extensive Evaluation of Factual Consistency in Large Language Models for Data-to-Text Generation
A broad evaluation of twelve LLMs on five data-to-text datasets shows Llama 2 leads on factual consistency, larger size usually helps, and reference divergence hurts scores.
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