Assertion: bursa | /r/CapableOf | prevent friction
Facets:
value: between the bones
type: LOCATION
value: by rubbing against each other
type: MANNER
value: from causing pain
type: TRANSITIVE-OBJECT
Source sentences:
text: By itself, the bursa is actually an advantage, as it prevents friction from causing pain when a person moves.
text: A bursa is a fluid filled sac which prevents friction in between the bones by rubbing against each other.