Assertion: crag martin | /r/HasProperty | ptyonoprogne concolor
Facets:
Source sentences:
text: The Dusky Crag Martin (Ptyonoprogne concolor) is a small passerine bird in the swallow family.
text: The Dusky Crag Martin (Ptyonoprogne concolor) is a small passerine bird in the swallow family.