The accuracy of a WSD system on the same set of 30 nouns dropped from an average of 85% when using Wikipedia 2007 to 62% when using Wikipedia 2012 (Dandala et al., 2012).
the rapid growth of Wikipedia over the recent years has brought benefits, such as increased word and sense coverage, but it has also led to complications, such as finer sense granularity, resulting in a markedly reduced performance of WSD systems.