A man in a black jacket plays the guitar out in public.
The man is playing a rock song.
We cannot tell if the song he is playing is a rock song.
exists e1 s1 s2 x1 x2 x3 x4.(n_guitar(x3) & in(e1,x4) & n_public(x4) & a_out(s2) & Manner(e1,s2) & Theme(e1,x3) & Actor(e1,x1) & v_play(e1) & in(x1,x2) & n_jacket(x2) & a_black(s1) & Theme(s1,x2) & n_man(x1))
exists e1 x1 x2 x3.(n_man(x1) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_song(x2) & of(x2,x3) & n_rock(x3))