Assertion: mayfly's pair | /r/HasProperty | absent
Facets:
value: in some species
type: OTHER
value: altogether
type: DEGREE
Source sentences:
text: The front pair of wings is much longer than the back pair (which are tiny or absent in a few species).
text: Most adult Mayflies have two pairs of wings however the second pair are considerably smaller than the first and in some species are absent altogether.