A girls is jumping in the sand.
A girl is jumping in a sand box.
Jumping in the sand does not imply being in a sand box.
exists e1 x1 x2.(n_sand(x2) & in(e1,x2) & Actor(e1,x1) & v_jump(e1) & n_girl(x1))
exists e1 x1 x2 x3.(in(e1,x2) & n_box(x2) & of(x2,x3) & n_sand(x3) & Actor(e1,x1) & v_jump(e1) & n_girl(x1))