Man playing on the drums.
A man is playing the drums but has no sense of rhythm.
"A man playing on the drums" does not mean that he has a sense of rhythm or has no sense of rhythm.
exists x1 x2 x3.(n_drum(x3) & a_topic(x1) & on(x1,x3) & n_playing(x1) & of(x1,x2) & n_man(x2))
exists e1 x1 x2 x3.(n_drum(x2) & -exists e2 x4 x5.(Theme(e2,x4) & Actor(e2,x3) & v_have(e2) & of(x4,x5) & n_rhythm(x5) & n_sense(x4)) & n_man(x3) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_man(x1))