Premise: 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 . Santa Clara ( [ ˌsæntəˈklærə ] ) is a city in Santa Clara County , California . Silicon Valley is a nickname for the southern portion of the San Francisco Bay Area , in the northern part of the U.S. state of California .
Hypothesis: Silicon Valley is a region in California.
Label: ENTAILMENT