Previous work in TempEval-2 (Verhagen et al., 2010) and our work (Hovy et al., 2012) have shown that accurate relation classifiers can be modeled with supervised approaches, provided that the expressions are limited to be in the same sentence.
there is almost no previous work on inter-sentence TERE (ISTERE), for three main reasons: • Across a document, the number of time-event pairs to consider is large, as they are quadratic in the number of time and event expressions.