Assertion: cricket's sound | /r/HasProperty | produced
Facets:
value: by rubbing their wings
type: MANNER
Source sentences:
text: The sound is produced by rubbing two parts of their bodies together, called stridulation.
text: These insects are very famous for their chirping sound, which is produced by rubbing their wings together, unlike the popular belief that it is the rubbing of the legs that causes it.
text: When these grooved sides of the wings are rubbed against each other, chirping sounds are produced.