The man is sitting on a stool playing the trombone.
A man is playing an instrument.
A trombone is an instrument.
exists e1 e2 x1 x2 x3.(n_trombone(x3) & n_man(x1) & for(e1,e2) & Theme(e2,x3) & Actor(e2,x1) & v_play(e2) & on(e1,x2) & n_stool(x2) & Actor(e1,x1) & v_sit(e1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_instrument(x2) & n_man(x1))