7470
Bobby Darin  ( born  Walden Robert Cassotto  ; May 14 1936 December 20 1973 ) was an American singer songwriter and actor of film and television .
 alternate names: Bobby Darin, Walden Robert Cassotto
Given options, please tell me the relationships of all the listed entity pairs.Output format is "relation1: word1, word2; relation2: word3, word4". 
Option: cities of residence, top members employees, members, alternate names, origin, state or provinces of residence, title of person, spouse, city of headquarters, NA, founded by, state or province of headquarters, employee of, countries of residence, country of birth, founded, subsidiaries, country of headquarters 
Text: {0} 
 Entity Pairs:  Bobby Darin, Walden Robert Cassotto 
Answer:
 alternate names: Bobby Darin, Walden Robert Cassotto