WorldTree: A Corpus of Explanation Graphs for Elementary Science Questions supporting Multi-hop Inference. - Peter A. Jansen; Elizabeth Wainwright; Steven Marmorstein; Clayton T. Morrison (LREC, 2018)

WorldTree V2: A Corpus of Science-Domain Structured Explanations and Inference Patterns supporting Multi-Hop Inference. - Zhengnan Xie; Sebastian Thiem; Jaycie Martin; Elizabeth Wainwright; Steven Marmorstein; Peter A. Jansen (LREC, 2020)