4270
Later that year Keith-Albee-Orpheum merged with David Sarnoff  Radio Corporation of America  (  RCA  ) to form Radio-Keith-Orpheum Pictures ( RKO Pictures ) .
 alternate names: Radio Corporation of America, RCA
Given a phrase that describes the relationship between two words, extract the words and the lexical relationship between them. The output format should be "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} 
Answer:
 alternate names: Radio Corporation of America, RCA