Assertion: passenger pigeon | /r/HasProperty | slaughtered extinct
Facets:
value: indiscriminately
type: MANNER
Source sentences:
text: The most common American wild pigeon is the small, gray-brown mourning dove Zenaidura macroura (sometimes called turtledove), similar to the once abundant passenger pigeon, which was slaughtered indiscriminately and became extinct in 1914.