Assertion: crop circle | /r/HasProperty | formed
Facets:
value: by vortex movement of air
type: CAUSE
Source sentences:
text: When a spate of circles appeared in the countryside near his Cambridge home in 1991, Hawking told a local newspaper that "crop circles are either hoaxes or formed by vortex movement of air
text: When a spate of circles appeared in the countryside near his Cambridge home in 1991, Hawking told a local newspaper that "crop circles are either hoaxes or formed by vortex movement of air"