Assertion: basking shark's skin | /r/HasProperty | rough
Facets:
value: very
type: DEGREE
value: to give protection
type: PURPOSE
Source sentences:
text: The skin of sharks is very rough to give them protection from other animals including other sharks; this is why shark skin was once used as sand paper.
text: Nevertheless, they should be treated with extreme caution because their skin is rough enough to cause injury, and a swipe with any of their fins can be harmful as well.