Assertion: benzene | /r/HasProperty | synthesized
Facets:
value: from other compounds
type: OTHER
value: usually
type: DEGREE
Source sentences:
text: Benzene is a natural constituent of crude oil, but it is usually synthesized from other compounds present in petroleum.
text: Benzene is a natural constituent of crude oil, and may be synthesized from other compounds present in petroleum.
text: Benzene is a natural constituent of crude oil, and may be synthesized from other compounds present in petroleum.