Assertion: starling's flock | /r/CapableOf | expand without any sort of leader
Facets:
value: frequently
type: TEMPORAL
Source sentences:
text: Flocks form a tight sphere-like formation in flight, frequently expanding and contracting and changing shape, seemingly without any sort of leader.
text: Flocks form a tight sphere-like formation in flight, frequently expanding and contracting and changing shape, seemingly without any sort of leader.