Premise: Marble Hill, Manhattan . It is the only Manhattan neighborhood on the mainland of North America . Politically a part of Manhattan and New York County , Marble Hill became an island in the Harlem River when it was separated from the island of Manhattan by the construction of the Harlem Ship Canal in 1895 . Because of this change in geography , Marble Hill is often associated with the Bronx and is part of two of the latter 's Community Board Districts .
Hypothesis: Marble Hill is a neighborhood outside of the New York City.
Label: CONTRADICTION