Assertion: yak | /r/CapableOf | use head
Facets:
value: to help them
type: PURPOSE
Source sentences:
text: When ground is covered with snow and ice, they break through the cover to the wilted grass beneath, using their hooves and heads.
text: When the ground is covered with snow, as it typically is for long periods, yak will paw through quite thick snow layers, using both head and face to help them to gain access to the wilted vegetation underneath.