A happy boy, jumps in the sand.
A boy enjoys the beach.
Sand can be found other places than the beach.
exists s1 x1 x2 x3.(n_sand(x3) & a_topic(x1) & rel(x1,x2) & in(x2,x3) & n_jump(x2) & n_boy(x1) & a_happy(s1) & Theme(s1,x1))
exists e1 x1 x2.(n_beach(x2) & Theme(e1,x2) & Actor(e1,x1) & v_enjoy(e1) & n_boy(x1))