Assertion: opium's morphine | /r/HasProperty | occurring substance
Facets:
value: naturally
type: MANNER
Source sentences:
text: Morphine is a naturally occurring substance found in the Asian poppy plant.
text: Morphine is a naturally occurring substance derived from the opium poppy plant often used to alleviate pain and other physical ailments.
text: Heroin is processed from morphine, which is a naturally occurring substance extracted from opium poppy plants.