A young girl jumping in the sand on the beach
A boy jumps in the grass
Girl and boy are different.
exists e1 s1 x1 x2 x3 x4.(n_beach(x4) & n_sand(x3) & a_topic(x1) & on(e1,x4) & in(e1,x3) & Actor(e1,x2) & v_jump(e1) & (x1 = x2) & n_girl(x1) & a_young(s1) & Theme(s1,x1))
exists e1 x1 x2.(n_grass(x2) & in(e1,x2) & Actor(e1,x1) & v_jump(e1) & n_boy(x1))