Quantitative analysis of treebanks using frequent subtree mining methods Scott Martens author 2009-08 text Proceedings of the 2009 Workshop on Graph-based Methods for Natural Language Processing (TextGraphs-4) Monojit Choudhury editor Samer Hassan editor Animesh Mukherjee editor Smaranda Muresan editor Association for Computational Linguistics Suntec, Singapore conference publication martens-2009-quantitative https://aclanthology.org/W09-3212/ 2009-08 84 92