A musician is playing a saxophone on a sidewalk.
A street performer plays saxophone
Musician does not imply street performer.
exists e1 x1 x2 x3.(on(e1,x3) & n_sidewalk(x3) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_saxophone(x2) & n_musician(x1))
exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_play(e1) & n_saxophone(x3) & n_performer(x1) & of(x1,x2) & n_street(x2))