Man on stage playing his guitar.
The man is famous
Not all stage guitar player is famous.
exists e1 x1 x2 x3 x4.(a_topic(x1) & on(x1,x2) & Theme(e1,x4) & Actor(e1,x3) & v_play(e1) & n_guitar(x4) & of(x4,x1) & n_male(x1) & (x2 = x3) & n_stage(x2) & n_man(x1))
exists s1 x1.(n_man(x1) & Theme(s1,x1) & a_famous(s1))