A boy is walking on a floor covered in graffiti.
The floor has graffiti.
The floor that the boy is walking on has graffiti.
exists e1 e2 x1 x2 x3 x4.(on(e1,x2) & in(e2,x4) & n_graffitus(x4) & Theme(e2,x3) & v_cover(e2) & (x2 = x3) & n_floor(x2) & Actor(e1,x1) & v_walk(e1) & n_boy(x1))
exists e1 x1 x2.(n_floor(x1) & Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & n_graffitus(x2))