Premise: Rikers Island ( [ ˈraɪkərz ] ) is New York City 's main jail complex , as well as the name of the 413.17 acre island on which it sits , on the East River between Queens and the mainland Bronx , adjacent to the runways of LaGuardia Airport . San Francisco ( initials SF ) ( [ sæn_frənˈsɪskoʊ ] , Spanish for Saint Francis ; Spanish : [ san franˈsisko ] ) , officially the City and County of San Francisco , is the cultural , commercial , and financial center of Northern California .
Hypothesis: San Francisco is the location of Rikers Island.
Label: CONTRADICTION