Matthew Purver author Christine Howes author Eleni Gregoromichelaki author Patrick Healey author 2009-09 text Patrick Healey editor Roberto Pieraccini editor Donna Byron editor Steve Young editor Matthew Purver editor Association for Computational Linguistics London, UK conference publication purver-etal-2009-split https://aclanthology.org/W09-3937/ 2009-09 262 271