Assertion: butterfly's exoskeleton | /r/CapableOf | keep the water
Facets:
value: inside their bodies
type: LOCATION
value: to ensure
type: PURPOSE
Source sentences:
text: The exoskeleton protects them and keeps the water inside their bodies so that they don’t dry out.
text: The exoskeleton protects them and also maintains the water inside their bodies to ensure that they do not dry.