Robust Compositional Polarity Classification Manfred Klenner author Stefanos Petrakis author Angela Fahrni author 2009-09 text Proceedings of the International Conference RANLP-2009 Galia Angelova editor Ruslan Mitkov editor Association for Computational Linguistics Borovets, Bulgaria conference publication klenner-etal-2009-robust https://aclanthology.org/R09-1034/ 2009-09 180 184