Assertion: tortoise's burrow | /r/HasProperty | underground
Facets:
Source sentences:
text: They dig underground burrows or rest in swamps to keep cool during the heat of the day.
text: The Aldabra Giant Tortoise is also known to dig underground burrows or rest in swamps to keep cool during the heat of the day.
text: Though adapted to life in the desert, these tortoises spend the hot part of the day in their underground burrow.