Assertion: gerbil's burrow | /r/HasProperty | between 15 and 20 feet
Facets:
value: with a central nest
type: OTHER
value: to surface level
type: LOCATION
value: in length
type: OTHER
value: with several openings
type: OTHER
Source sentences:
text: The average burrow is between 15 and 20 feet in length with a central nest and several openings to surface level.