A Hybrid Approach to Domain-Specific Entity Linking

The current state-of-the-art Entity Linking (EL) systems are geared towards corpora that are as heterogeneous as the Web, and therefore perform sub-optimally on domain-specific corpora. A key open problem is how to construct effective EL systems for specific domains, as knowledge of the local context should in principle increase, rather than decrease, effectiveness. In this paper we propose the hybrid use of simple specialist linkers in combination with an existing generalist system to address this problem. Our main findings are the following. First, we construct a new reusable benchmark for EL on a corpus of domain-specific conversations. Second, we test the performance of a range of approaches under the same conditions, and show that specialist linkers obtain high precision in isolation, and high recall when combined with generalist linkers. Hence, we can effectively exploit local context and get the best of both worlds.Comment: SEM'1

Succinct summaries of narrative events using social networks

This paper addresses the following research aim: provide a useful but succinct summary of long narrative events involving the interaction of several speakers. The summary should enable users to navigate to specific parts of the event using hyperlinks. Our solution is based on a representation of the main actors of the event and their interactions as a social network. The solution is applicable to events in which these interactions are more or less formally structured and detectable. This includes theatre and radio plays, recordings of a scientific workshop, proceedings of parliament and meetings notes in general