Assertion: petrel's tail | /r/HasProperty | the size of a purple martin
Facets:
value: roughly
type: DEGREE
Source sentences:
text: The ashy storm-petrel, as the name implies, is an entirely gray seabird with a forked tail, roughly the size of a purple martin.
text: The ashy storm-petrel, as the name implies, is an entirely gray seabird with a forked tail, roughly the size of a purple martin.