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Since its offering , Google has quadrupled its staff , to more than 9,000 employees -- many with doctorates from the world 's leading universities -- and it is hiring more than 100 people a week to fill three dozen or so offices in more than 20 countries ; its headquarters are in Mountain View , Calif. , in Silicon Valley .
 location contains: Silicon Valley, Mountain View
Given options, please tell me the relationships of all the listed entity pairs.Output format is "relation1: word1, word2; relation2: word3, word4". 
Option: ethnicity, place lived, geographic distribution, company industry, country of administrative divisions, administrative division of country, location contains, person of company, profession, ethnicity of people, company shareholder among major shareholders, sports team of location, religion, neighborhood of, company major shareholders, place of death, nationality, children, company founders, company founded place, country of capital, company advisors, sports team location of teams, place of birth 
Text: {0} 
 Entity Pairs:  Silicon Valley, Mountain View 
Answer:
 location contains: Silicon Valley, Mountain View