Refining imprecise spatio-temporal events
Andreas Spitz, Johanna Geiß, Michael Gertz, Stefan Hagedorn, Kai-Uwe Sattler · 2016
Events as composites of temporal, spatial and actor information are a central object of interest in many information retrieval (IR) scenarios. There are several challenges to such event-centric IR, which range from the detection and extraction of geographic, temporal and actor mentions in documents to the construction of event descriptions as triples of locations, dates, and actors that can support event query scenarios. For the latter challenge, existing approaches fall short when dealing with imprecise event components. For example, if the exact location or date is unknown, existing IR methods are often unaware of different granularity levels and the conceptual proximity of dates or locations.