Assertion: sunscreen's spf | /r/CapableOf | allow 1/15 of uvb-rays
Facets:
Source sentences:
text: SPF 3 will allow 1/3 of UVB-rays to penetrate through the sunscreen, SPF 15 will allow 1/15 of UVB-rays (~7 %), SPF 30 1/30 (~3%), and SPF 50 1/50 (2%).