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During his six-year tenure as Los Angeles County district attorney , Sirhan was tried and convicted for the 1968 assassination of U.S. Sen. Robert Kennedy .
 Sirhan, U.S. Sen. Robert Kennedy
Please list all entity pairs containing a certain relationship in the given options.Output format is "word1, word2; word3, word4". 
Option: Organization based in, Located in, Live in, Work for, Kill 
Text: {0} 
Answer:
 Sirhan, U.S. Sen. Robert Kennedy