The University of Pisa participated to TREC 2002's QA track with PiQASso, a vertical QA system developed (except for some of the linguistic tools), entirely within our research group at the Computer Science department. The system features a filter-and-loop architecture in which non-promising paragraphs are ruled out basing on features ranging from keyword matching to complex semantic relation matching. The system also exploits the Web in order to get "hints'' at what to look for in the internal collection. This article describes the system in its entire architecture, concentrating on the Web exploitation, providing figures of its efficacy.
Web suggestions and robust validation for QA
ATTARDI, GIUSEPPE;CISTERNINO, ANTONIO;SIMI, MARIA;
2002-01-01
Abstract
The University of Pisa participated to TREC 2002's QA track with PiQASso, a vertical QA system developed (except for some of the linguistic tools), entirely within our research group at the Computer Science department. The system features a filter-and-loop architecture in which non-promising paragraphs are ruled out basing on features ranging from keyword matching to complex semantic relation matching. The system also exploits the Web in order to get "hints'' at what to look for in the internal collection. This article describes the system in its entire architecture, concentrating on the Web exploitation, providing figures of its efficacy.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
