Assertion: wolf's pup | /r/HasProperty | born in den
Facets:
Source sentences:
text: Pups are born in a den, which can be a depression in the ground or grass, a cave, burrow, hollow log, or fallen tree.
text: Help also includes pack members bringing food for the alpha female when the pups are just born and she cannot leave the den.
text: Pups are born in the den and will remain there for several weeks after birth.
text: Two to six pups are born in a den after a gestation period of two months.