Assertion: humpback whale | /r/CapableOf | singe unknown type of song
Facets:
Source sentences:
text: Teams of researchers observed a male humpback whale singing an unknown type of song and approaching a fin whale at Rarotonga in 2014.
text: Teams of researchers observed a male humpback whale singing an unknown type of song and approaching a fin whale at Rarotonga in 2014.