#rock_'n'_roll_musician__rocker  a performer (or composer) of rock music
  supertype:  #instrumentalist__musician__player  someone who plays a musical instrument (as a profession)
  subtype:  #rock_star  a famous singer of rock music
     instance:  #Charles_Edward_Berry__Berry__Chuck_Berry  #William_John_Clifton_Haley_Jr.__Haley__Bill_Haley  #George_Harrison__Harrison  #Buddy_Holly__Holly__Charles_Hardin_Holley  #Michael_Philip_Jagger__Jagger__Mick_Jagger  #John_Lennon__Lennon  #Jerry_Lee_Lewis__Lewis  #Sir_James_Paul_McCartney__McCartney__Paul_McCartney  #James_Douglas_Morrison__Morrison__Jim_Morrison  #Elvis_Aron_Presley__Presley__Elvis_Presley  #Ringo_Starr__Starr__Richard_Starkey

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