Assertion: pit viper | /r/HasAspect | heat-sensing pits
Facets:
value: near their nostrils
type: LOCATION
value: on either side of its head
type: LOCATION
Source sentences:
text: Copperheads are a type of snake known as a pit viper, which is a type of snake that has heat-sensing pits on either side of its head.
text: Like all pit vipers, palm pit vipers have heat-sensing pits near their nostrils that they use to detect prey.