Subgroup Detector: A System for Detecting Subgroups in Online Discussions Amjad Abu-Jbara author Dragomir Radev author 2012-07 text Proceedings of the ACL 2012 System Demonstrations Min Zhang editor Association for Computational Linguistics Jeju Island, Korea conference publication abu-jbara-radev-2012-subgroup https://aclanthology.org/P12-3023/ 2012-07 133 138