Fernando Pereira Anand Rajaraman Sunita Sarawagi William Tunstall-Pedoe Gerhard Weikum Alon Y. Halevy Answering Web Questions Using Structured Data - Dream or Reality? 1646 2009 2 PVLDB 2 http://www.vldb.org/pvldb/2/vldb09-panel1.pdf db/journals/pvldb/pvldb2.html#PereiraRSTWH09