Assertion: yawning | /r/HasProperty | triggered
Facets:
value: because of a human trait
type: CAUSE
value: involuntarily
type: MANNER
value: by reading about it
type: MANNER
Source sentences:
text: And some studies show that yawning is triggered when the brain is in need of oxygen.
text: Yawning may be triggered only by reading about it.
text: Researchers at the University of Nottingham in England say yawning is triggered involuntarily when others yawn because of a human trait called echophenomena.