We borrow machine learning features which have been successfully used in WSD.
because we do not have data labeled with the S/O coarse-grained senses and we did not want to undertake the annotation effort at this stage, we created an annotated corpus by combining two types of sense annotations: (1) labels of senses within a dictionary as S or O (i.e., subjectivity sense labels), and (2) sense tags of word instances in a corpus (i.e., sense-tagged data).