40444
Filters near Lake Tahoe in the mountains of eastern California '' are the darkest that we 've seen '' outside smoggy urban areas , said Steven S. Cliff , an atmospheric scientist at the University of California at Davis .
 location contains: California, Lake Tahoe; location contains: California, Davis
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, Lake Tahoe; California, Davis 
Answer:
 location contains: California, Lake Tahoe; location contains: California, Davis