Assertion: sunscreen's spf | /r/UsedFor | refer to one type of uv exposure
Facets:
value: to uvb rays
type: TRANSITIVE-OBJECT
Source sentences:
text: However, SPF only refers to one type of UV exposure—to UVB rays—and does not factor in exposure to UVA rays, which tend to penetrate more deeply into the skin and can contribute to more dangerous cancers like melanoma.