25129
 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 . 
 location contains: Silicon Valley, Palo Alto
Given options, please tell me the relationships of all the listed entity pairs.Output format is "relation1: word1, word2; relation2: word3, word4". 
Option: nationality, country capital, place of death, children, location contains, place of birth, place lived, administrative division of country, country of administrative divisions, company, neighborhood of, company founders 
Text: {0} 
 Entity Pairs:  Silicon Valley, Palo Alto 
Answer:
 location contains: Silicon Valley, Palo Alto