Overview of CLEF QA Entrance Exams Task 2015

This paper describes the Entrance Exams task at the CLEF QA Track 2015. Following the last two editions, the data set has been extracted from actual university entrance examinations including a variety of topics and question types. Systems receive a set of Multiple-Choice Reading Comprehension tests where the task is to select the correct answer among a finite set of candidates, according to the given text. Questions are designed originally for testing human examinees, rather than evaluating computer systems. Therefore, the data set challenges human ability to show their understanding of texts. Thus, questions and answers are lexically distant from their supporting excerpts in text, requiring not only a high degree of textual inference, but also the development of strategies for selecting the correct answer.