Troels Andreasen Per Anker Jensen Jørgen Fischer Nilsson Patrizia Paggio Bolette Sandford Pedersen Hanne Erdman Thomsen Ontological Extraction of Content for Text Querying. 123-136 2002 conf/nldb/2002 NLDB http://link.springer.de/link/service/series/0558/bibs/2553/25530123.htm db/conf/nldb/nldb2002.html#AndreasenJNPPT02