A man playing a synthesizer wearing a green sweater and hat.
The man was playing an instrument.
A man playing a synthesizer means a man playing an instrument, as the synthesizer is an instrument.
exists e1 e2 s1 x1 x2 x3 x4 x5 x6 x7.(a_topic(x1) & Theme(e2,x3) & Actor(e2,x2) & v_play(e2) & Theme(e1,x5) & Actor(e1,x4) & v_wear(e1) & n_hat(x7) & n_sweater(x6) & a_green(s1) & Theme(s1,x6) & subset_of(x7,x5) & subset_of(x6,x5) & (x3 = x4) & n_synthesizer(x3) & (x1 = x2) & n_man(x1))
exists e1 x1 x2.(n_man(x1) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_instrument(x2))