Diachronic Variation in Grammatical Relations Aaron Gerow author Khurshid Ahmad author 2012-12 text Proceedings of COLING 2012: Posters Martin Kay editor Christian Boitet editor The COLING 2012 Organizing Committee Mumbai, India conference publication gerow-ahmad-2012-diachronic https://aclanthology.org/C12-2038/ 2012-12 381 390