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The discography of  Billie Piper  ( as known as  Billie  ) an English pop music singer consists of two studio albums two compilation albums and nine singles .
 Billie Piper, Billie
Please list all entity pairs containing a certain relationship in the given options.Output format is "word1, word2; 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:
 Billie Piper, Billie