Assertion: petrel's burrow | /r/HasProperty | dug in sand
Facets:
value: usually
type: TEMPORAL
Source sentences:
text: Both parents participate in digging burrows, which are usually dug in sand, and are between 1-3m long.
text: Both parents participate in digging burrows, which are usually dug in sand or hard coral substrate, and are between 1 and 3 m long.