Assertion: otter | /r/HasAspect | their cubs
Facets:
value: in underground burrows
type: LOCATION
value: in underground dens
type: LOCATION
Source sentences:
text: 3 Otters have their cubs in underground dens called holts, which they dig themselves.
text: Otters have their cubs in underground burrows, known as a ‘holt’.
text: Otters have their cubs in underground burrows, known as 'holts'.