Assertion: penguin's feather | /r/CapableOf | rub against contact
Facets:
value: with water
type: OTHER
value: with the ground
type: TRANSITIVE-OBJECT
Source sentences:
text: Moulting is an important process for the penguins, as their feathers wear out through the course of a year due to rubbing against other penguins, contact with the ground and water, and constant preening.