Assertion: prairie dog | /r/CapableOf | kill herbivorous mammal
Facets:
value: until 2007
type: TEMPORAL
value: actively
type: MANNER
Source sentences:
text: Dr. John Hoogland of the University of Maryland's Center for Environmental Science has been studying prairie dogs for 43 years, but had never seen a prairie dog actively kill another herbivorous mammal until 2007.