Assertion: sunscreen's spf | /r/HasProperty | measure
Facets:
value: by applying sunscreen
type: MANNER
Source sentences:
text: SPF stands for “Sun Protection Factor”, and is a measure of
text: The SPF can be measured by applying sunscreen to the skin of a volunteer and measuring how long it takes before sunburn occurs when exposed to an artificial sunlight source.
text: SPF (short for "sun protection factor") is a measure of how well a sunscreen protects you from UVB.
text: Sun Protection Factor (SPF): SPF is a measure of how long a person can stay in the sun before its UVB rays start to burn the skin.
text: Dr. Carlos Charles: SPF stands Sun Protection Factor and is a measure of how well a sunscreen will protect against ultraviolet B rays.
text: However, that’s just the way SPF is measured.