ISO-TimeML Event Extraction in Persian Text Yadollah Yaghoobzadeh author Gholamreza Ghassem-sani author Seyed Abolghasem Mirroshandel author Mahbaneh Eshaghzadeh author 2012-12 text Proceedings of COLING 2012 Martin Kay editor Christian Boitet editor The COLING 2012 Organizing Committee Mumbai, India conference publication yaghoobzadeh-etal-2012-iso https://aclanthology.org/C12-1179/ 2012-12 2931 2944