Abstract
We have been studying automatic generation of a mediatory summary for facilitating users in assessing the credibility of information on the Web. A mediatory summary is a brief description extracted from relevant Web documents in situations where a pair of statements that appear to contradict each other at first glance can actually coexist under a certain situation. In general, because there are several such pairs, users should clarify the pair whose credibility they are assessing. In this paper, we propose an interactive method for generating a mediatory summary in which users specify the pair of statements they are interested in assessing. Furthermore, we attempt to improve the method in terms of both precision and recall by introducing the position of key expressions such as adversative conjunctions, conditional expressions, and conclusive conjunctions and the number of sentences that are not useful for the mediatory summary. Results of the analysis performed using the mediatory summary corpus indicate that the proposed method achieved a precision of 0.231 for the generated summaries ranked in the top 10, while the previous method (Shibuki et al. 2011a) achieved a precision of 0.050.
