constructing WIKIBIO [94], a dataset for generating biographical notes based on the infoboxes
of Wikipedia, the authors took the Wikipedia infobox as the source and the first sentence of the
Wikipedia page as the target ground-truth reference. However, the first sentence of the Wikipedia
article is not necessarily equivalent to the infobox in terms of the information they contain. Indeed,
Dhingra et al. [30] points out that 62% of the first sentences in WIKIBIO have additional information
not stated in the corresponding infobox. Such mismatch between source and target in datasets can
lead to hallucination.

ACM Comput. Surv., Vol. 1, No. 1, Article . Publication date: February 2022.

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Ziwei Ji, et al.
SurveyofHallucinationinNatural Language Generation