  This paper revisits the one sense per collocation hypothesis using
fine-grained sense distinctions and two different corpora. We show that the
hypothesis is weaker for fine-grained sense distinctions (70% vs. 99% reported
earlier on 2-way ambiguities). We also show that one sense per collocation does
hold across corpora, but that collocations vary from one corpus to the other,
following genre and topic variations. This explains the low results when
performing word sense disambiguation across corpora. In fact, we demonstrate
that when two independent corpora share a related genre/topic, the word sense
disambiguation results would be better. Future work on word sense
disambiguation will have to take into account genre and topic as important
parameters on their models.
