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Wilson Sonsini , based in Palo Alto , represents , or at least represented , at least half the Silicon Valley technology companies implicated in the backdated-options scandal , according to The Recorder , a law publication in San Francisco .
 Silicon Valley, Palo Alto
Please list all entity pairs containing a certain relationship in the given options.Output format is "word1, word2; 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} 
Answer:
 Silicon Valley, Palo Alto