University of Chile, University of Chile, National Center for Artificial Intelligence, University of Chile, University of Patras, University of Patras, Athena Research Center - Institute for Language and Speech Processing, University of Patras, University of Patras, University of Patras, Democritus University of Thrace, University of Patras, affiliation not provided to SSRN, University of Patras, University of Patras and Democritus University of Thrace