Anette Frank Markus Becker Berthold Crysmann Bernd Kiefer Ulrich Schäfer Integrated Shallow and Deep Parsing: TopP Meets HPSG. 104-111 2003 ACL http://acl.ldc.upenn.edu/acl2003/main/pdfs/Frank.pdf db/conf/acl/acl2003.html#FrankBCKS03