 WordNet is a computerized lexical database for English built by George Miller in 1985 with a hierarchical structure of semantic categories intended to reflect empirical observations regarding human processing. A category “bird” includes a sub-category “songbirds” with “canary” as a particular, for example, intended to explain the fact that subjects could more quickly process “canaries sing”—which involves traversing just one categorical step—than they could process “canaries fly” (Miller, Beckwith, Fellbaum, Gross, &amp; Miller 1990).