A Japanese Corpus of Referring Expressions Used in a Situated Collaboration Task

In order to pursue research on generating referring expressions in a situated collaboration task, we set up a data-collection experiment based on the Tangram puzzle. For a pair of participants we recorded every utterance in synchronisation with the current state of the puzzle as well as all operations by the participants. Referring expressions were annotated with their referents in order to build a referring expression corpus in Japanese. We provide preliminary results on the analysis of the corpus from various standpoints, focussing on action-mentioning expressions.