Assertion: pit viper's pit | /r/HasProperty | heat-sensitive
Facets:
value: heat
type: DEGREE
Source sentences:
text: Pit vipers are snakes that have a heat-sensitive pit between their eyes and nose; these snakes have two pits, one on each side of its head.
text: These pits are actually heat-sensing organs that allow the snakes to see in infrared — an invaluable sixth sense for a predator that often hunts at night.