A singer performs for a crowd in front of multicolored lights.
The singer is singing a rock song.
Singers don't just perform rock songs.
exists e1 s1 x1 x2 x3 x4.(for(e1,x2) & in(x2,x3) & of(x3,x4) & n_light(x4) & a_multicolored(s1) & Theme(s1,x4) & n_front(x3) & n_crowd(x2) & Actor(e1,x1) & v_perform(e1) & n_singer(x1))
exists e1 x1 x2 x3.(n_singer(x1) & Theme(e1,x2) & Actor(e1,x1) & v_sing(e1) & n_song(x2) & of(x2,x3) & n_rock(x3))