Assertion: poison ivy's oil | /r/AtLocation | oak
Facets:
Source sentences:
text: According to the American Academy of Dermatology, an estimated 85 percent of the population is allergic to the urushiol oil found in poison ivy, oak, and sumac.
text: Fact: The rash is caused by the urushiol oil found in poison ivy, oak and sumac and is not spread by the fluid in the blisters.