Assertion: opium | /r/HasProperty | referenced in literature
Facets:
value: widely
type: DEGREE
Source sentences:
text: Opium or the poppy plant has been widely referenced in movies and literature but likely the most famous instance of this is the use of the poppy plants in The Wonderful Wizard of Oz in which the wicked witch used them to put Dorothy & her friends to sleep before they reached the Emerald City