Extracting Signed Social Networks from Text Ahmed Hassan author Amjad Abu-Jbara author Dragomir Radev author 2012-07 text Workshop Proceedings of TextGraphs-7: Graph-based Methods for Natural Language Processing Irina Matveeva editor Ahmed Hassan editor Gael Dias editor Association for Computational Linguistics Jeju, Republic of Korea conference publication hassan-etal-2012-extracting https://aclanthology.org/W12-4102/ 2012-07 6 14