Assertion: snake | /r/CapableOf | keep their tongue
Facets:
value: in motion
type: OTHER
value: constantly
type: TEMPORAL
Source sentences:
text: Therefore, to determine the presence of prey or predators in the local environment, the snakes keep their tongue constantly in motion.
text: They keep their tongues constantly in motion, sampling particles from the air, ground, and water, analyzing the chemicals found, and determining the presence of prey or predators in the local environment.