r Given any formula rel(c 1 , c 2 ) for semantic relatedness between two concepts c 1 and c 2 , the relatedness rel(w 1 , w 2 ) between two words w 1 and w 2 can be calculated as where s(w i ) is "the set of concepts in the taxonomy that are senses of word w i " (Resnik 1995).
the relatedness of two words is equal to that of the most-related pair of concepts that they denote.