A man in a dark jacket is playing an instrument.
A man playing the violin
Not all musical instruments are the violin.
exists e1 s1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_play(e1) & n_instrument(x3) & in(x1,x2) & n_jacket(x2) & a_dark(s1) & Theme(s1,x2) & n_man(x1))
exists e1 x1 x2 x3.(n_violin(x3) & a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_play(e1) & (x1 = x2) & n_man(x1))