#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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