Assertion: skid mark | /r/HasProperty | the result of bituminous oils
Facets:
value: usually
type: DEGREE
value: on asphalt road surfaces
type: LOCATION
Source sentences:
text: On asphalt road surfaces, skid marks are usually the result of bituminous oils in the asphalt that are heated because of the friction of braking or accelerating and rise to the surface, leaving dark marks.