Assertion: sulfur | /r/CapableOf | help to give hardness
Facets:
value: to give shape
type: PURPOSE
Source sentences:
text: Sulfur is also present in keratin, which is necessary for the maintenance of the skin, hair, and nails, helping to give strength, shape, and hardness to these protein tissues.
text: Sulfur is also present in keratin, which is necessary for the maintenance of the skin, hair, and nails, helping to give strength, shape, and hardness to these protein tissues.