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The bridge consists of two crossings , east and west of Yerba Buena Island , a natural mid-bay outcropping inside San Francisco city limits .
 location: Yerba Buena Island; location: San Francisco
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 location: Yerba Buena Island; location: San Francisco