Assertion: birdcall | /r/HasProperty | heard
Facets:
value: online
type: LOCATION
Source sentences:
text: Swamp sparrows employ 3-5 different song types, and the neural activity differs depending on which song is heard or sung.
text: The songs and calls of more than 550 North American birds can now be heard online.
text: The songs and calls of more than 550 North American birds can now be heard online.
text: Swamp sparrows employ 3-5 different song types, and the neural activity differs depending on which song is heard or sung.