Assertion: sunscreen's nanoparticle | /r/HasProperty | 1000 times smaller
Facets:
Source sentences:
text: Nanoparticles can be 1000 times smaller than the width of a human hair.
text: Nanoparticles, which can be 1000 times smaller than the width of a human hair, have not been properly assessed for their potential effects on human health or the environment.