Assertion: insect's wing | /r/CapableOf | unite bird
Facets:
value: functionally
type: DEGREE
Source sentences:
text: The distinction is one of convenience only; it is not based on any clear biologically homologous trait, any more than the common trait of having wings functionally unites insects, bats, and birds, or than not having wings unites tortoises, snails and sponges.