Assertion: monarch's spot | /r/HasProperty | black
Facets:
Source sentences:
text: Male monarchs can be distinguished by the two black spots on their hind wings, while female monarchs have a slightly thicker black border.
text: Male monarchs have two black spots in the center of their hind wings, which females lack.
text: The male monarchs have a black spot on each of the hind wings over a vein.