Premise: The American Civil War was fought in the United States from 1861 to 1865 . Walt Whitman . Born in Huntington on Long Island , Whitman worked as a journalist , a teacher , a government clerk , and -- in addition to publishing his poetry -- was a volunteer nurse during the American Civil War .
Hypothesis: Walt Whitman volunteered during a war that was fought in the United States.
Label: ENTAILMENT