Assertion: poison ivy's oil | /r/Causes | allergic rash
Facets:
value: in most people
type: OTHER
value: upon contact with skin
type: TEMPORAL
Source sentences:
text: The fruit and leaves of the poison sumac plant contain urushiol, an oil that causes an allergic rash upon contact with skin.
text: The oil in poison ivy/oak/sumac plants (called urushiol) can cause an allergic rash in most people who come into contact with it.