Assertion: burrowing frog | /r/HasAspect | flap-like toe extension
Facets:
value: on the hind feet
type: LOCATION
Source sentences:
text: Some burrowing frogs such as Couch's spadefoot (Scaphiopus couchii) have a flap-like toe extension on the hind feet, a keratinised tubercle often referred to as a spade, that helps them to burrow.