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In the California electricity crisis , power producers were able to bring the state to its knees when they realized that they could cause prices to soar by withholding only small amounts of electricity , said Dr. Frank Wolak , a professor at Stanford .
 location contains: California, Stanford
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:  California, Stanford 
Answer:
 location contains: California, Stanford