A small child is playing with a toy in front of a wall.
The small child in front of the wall is playing with a ball.
A toy is not always a ball.
exists e1 s1 x1 x2 x3 x4.(with(e1,x2) & in(x2,x3) & of(x3,x4) & n_wall(x4) & n_front(x3) & n_toy(x2) & Actor(e1,x1) & v_play(e1) & n_child(x1) & a_small(s1) & Theme(s1,x1))
exists e1 s1 x1 x2 x3 x4.(n_wall(x3) & n_child(x1) & a_small(s1) & Theme(s1,x1) & with(e1,x4) & n_ball(x4) & Actor(e1,x1) & v_play(e1) & in(x1,x2) & of(x2,x3) & n_front(x2))