Assertion: grouse's number | /r/CapableOf | hear drumming
Facets:
Source sentences:
text: The survey, which tallies the number of male grouse heard “drumming” as they rapidly beat their wings in an effort to attract a mate, follows the same routes every year.
text: The survey, which tallies the number of male grouse heard "drumming" as they rapidly beat their wings in an effort to attract a mate, follows the same routes every year.