A person in a red coat plays an electric guitar.
A person plays a metal song.
Just because a person is playing on electric guitar does not mean that he/she is playing a metal song.
exists e1 s1 s2 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_play(e1) & n_guitar(x3) & a_electric(s2) & Theme(s2,x3) & in(x1,x2) & n_coat(x2) & a_red(s1) & Theme(s1,x2) & n_person(x1))
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_song(x2) & of(x2,x3) & n_metal(x3) & n_person(x1))