Assertion: petrel's nest | /r/HasProperty | burrow
Facets:
value: along the banks of rivers
type: LOCATION
value: with a chamber at the bottom
type: OTHER
Source sentences:
text: The nest is a burrow around 50 cm long with a chamber at the bottom which may or may not be lined with dried grass.
text: Their nests are burrows along the banks of rivers, and also in marshes.