Multi-entity Sentiment Scoring Karo Moilanen author Stephen Pulman 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 moilanen-pulman-2009-multi https://aclanthology.org/R09-1048/ 2009-09 258 263