Assertion: poison ivy's substance | /r/HasProperty | obtained
Facets:
value: from the plant
type: LOCATION
value: directly
type: MANNER
Source sentences:
text: The toxic substance may be obtained directly from the plant, which thereupon acts on the skin (primary photosensitivity), or the toxicity may result from liver damage caused by the metabolism of a toxic plant and failure of the breakdown products to be eliminated by the liver (hepatic photosensitivity).