In MESIA project, we tackled the problem of reach an acceptable degree of accuracy in finding links that contains relevant documents to the user consult. The current prototype interacts with the web-pages of the Madrid Local Government (www.comadrid.es) through AltaVista. The filtering process consists in the consult modification, the structural and linguistic analysis of the links texts and the use of the user model and past experience when available to obtain the final answer. The system evaluation has started not only measured by time and space, but also by the retrieved answers set precision.