Assertion: cricket's song | /r/HasProperty | based on pure tone
Facets:
value: at 3.5 khz
type: TEMPORAL
value: in gryllotalpa gryllotalpa
type: LOCATION
value: almost
type: DEGREE
Source sentences:
text: In Gryllotalpa gryllotalpa, the song is based on an almost pure tone at 3.5 kHz, loud enough to make the ground vibrate 20 cm all round the burrow; in fact, the song is unique in each species.