Premise: 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 . The word `` silicon '' originally referred to the large number of silicon chip innovators and manufacturers in the region , but the area is now the home to many of the world 's largest high-tech corporations , including the headquarters of 39 businesses in the Fortune 1000 , and thousands of startup companies .
Hypothesis: Silicon Valley is a geographical area.
Label: ENTAILMENT