Functional similarity.
"Following (Turney, 2012), we define the functional similarity of
two concepts to be the degree to which two concepts are observed with the same statements. The
concepts 'coffee' and 'tea' for example are functionally similar, because they share a large set of
statements, such as '[SO/STH] may drink [ ]', '[SO/STH] may sip [ ]' and '[SO/STH] may pour [ ]'.
We measure the similarity of two concepts or statements using the cosine distance
(Bullinaria and Levy, 2007) over shared attributes in a vector space presentation. The closer the
cosine distance is to 0, the more similar two concepts or statements are. We describe the process
of calculating the cosine distance in greater detail in (Akbik et al., 2012)."