Assertion: porpoise's fin | /r/HasProperty | true dorsal
Facets:
Source sentences:
text: The porpoise is named so since it is the only porpoise that lacks a true dorsal fin.
text: The finless porpoise is the only porpoise to lack a true dorsal fin.
text: The finless porpoise is the only porpoise to lack a true dorsal fin.
text: As the name suggests, the finless porpoise is the only porpoise to lack a true dorsal fin.