A child plays on the ground in a pile of leaves.
A child jumps in a pile of leaves.
Just because the child plays in leaves, it doesn't mean that he or she jumps in them.
exists e1 x1 x2 x3 x4.(n_ground(x2) & on(e1,x2) & in(x2,x3) & of(x3,x4) & n_leaf(x4) & n_pile(x3) & Actor(e1,x1) & v_play(e1) & n_child(x1))
exists e1 x1 x2 x3.(in(e1,x2) & of(x2,x3) & n_leaf(x3) & n_pile(x2) & Actor(e1,x1) & v_jump(e1) & n_child(x1))