A guitarist on stage playing and singing with his keyboardist in the background.
the guitarist is paid
There is no mention they are being paid for playing music.
exists e1 x1 x2 x3 x4 x5 x6 x7.(n_background(x7) & a_topic(x1) & on(x1,x2) & subset_of(e1,x2) & with(e1,x6) & in(x6,x7) & n_keyboardist(x6) & of(x6,x1) & n_male(x1) & Actor(e1,x5) & v_sing(e1) & n_thing(x5) & subset_of(x3,x2) & n_playing(x3) & of(x3,x4) & n_stage(x4) & n_guitarist(x1))
exists e1 x1.(n_guitarist(x1) & Theme(e1,x1) & v_pay(e1))