Assertion: pigeon | /r/CapableOf | play crucial role
Facets:
value: in world war i
type: TEMPORAL
value: because of their speed
type: CAUSE
value: because of ability
type: CAUSE
Source sentences:
text: Pigeons played a crucial role in communication during World War I because of their speed and ability to fly at great heights.
text: Dogs and pigeons played a crucial a role in World War I, but horses and mules are perhaps the animals most commonly associated with the Great War.