(1) The relation of hyponym, superordinate, synonym and inclusion of words have influenced our comprehension in sentence meaning.

(2) Intuitively, you know that "wisteria" is therefore a hyponym of "traceophyte," because you know that the "hyponym of" relationship is transitive.

(3) Indeed, the WordNet model says that "wisteria" is a hyponym of "vine," and "vine" is a hyponym of "traceophyte."

(4) Listing 5 is client code that takes a word and returns the hyponym chain as a Python set.

(5) I'm actually going to use a subset of the WordNet model here, containing only those nouns beneath "plant life" in the hyponym hierarchy.