Treebank Conversion - Establishing a testsuite for a broad-coverage LFG from the TIGER treebank Martin Forst author 2003 text Proceedings of 4th International Workshop on Linguistically Interpreted Corpora (LINC-03) at EACL 2003 conference publication forst-2003-treebank https://aclanthology.org/W03-2404/ 2003