Assertion: florida manatee | /r/HasProperty | mythical sirens
Facets:
value: by sailors
type: OTHER
Source sentences:
text: Once thought by sailors to be mythical sirens or mermaids, the Florida manatee, or sea cow, was one of America's most endangered species.
text: Once thought by sailors to be mythical sirens or mermaids, the Florida manatee, or sea cow, was one of America's most endangered species.