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A Pew Research Center survey revealed that California is somewhat less religious than the rest of the states : 62 percent of Californians say they are " absolutely certain " of their belief in God , while in the nation 71 percent say so .
 Pew Research Center, California
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Pew Research Center, California