Instance Level Transfer Learning for Cross Lingual Opinion Analysis Ruifeng Xu author Jun Xu author Xiaolong Wang author 2011-06 text Proceedings of the 2nd Workshop on Computational Approaches to Subjectivity and Sentiment Analysis (WASSA 2.011) Alexandra Balahur editor Ester Boldrini editor Andres Montoyo editor Patricio Martinez-Barco editor Association for Computational Linguistics Portland, Oregon conference publication xu-etal-2011-instance https://aclanthology.org/W11-1724/ 2011-06 182 188