Steven Bird Kazuaki Maeda Xiaoyi Ma Haejoong Lee Beth Randall Salim Zayat TableTrans, MultiTrans, InterTrans and TreeTrans: Diverse Tools Built on the Annotation Graph Toolkit http://arxiv.org/abs/cs.CL/0204006 2002 CoRR cs.CL/0204006 db/journals/corr/corr0204.html#cs-CL-0204006 informal publication