Assertion: spiny dogfish's fin | /r/HasProperty | falcate
Facets:
value: with concave posterior margins
type: OTHER
value: with angular free rear tips
type: OTHER
Source sentences:
text: Pectoral fins are falcate with angular free rear tips and concave posterior margins
text: The pectoral fins are falcate, or curved inward, and have strongly concave posterior margins.