Event Identification for Explicit and Implicit References on Microblogs

Abstract

We address the problem of event identification on microblogs with special attention to implicit reference cases in which events are not referred to by event's information. Most studies identify events referred to by event's information, while there are many implicitly referred events by microblogs, which are difficult to identify for short text such as microblogs. We therefore tackled implicit reference cases by analyzing links from microblogs. The links are able to connect opinions or feeling to their referred events. The analysis of links is particularly important for certain types of implicit references. In addition, we predict reference type of a microblog for accurately ranking referred events. The experimental results suggest that our method was effective for implicit references and predicting reference type was essential for identifying implicitly or explicitly referred events together.