The boy is jumping into the large pool.
A boy is jumping into an empty pool.
The pool could have been full, it's not implied that it was empty.
exists e1 s1 x1 x2.(n_pool(x2) & a_large(s1) & Theme(s1,x2) & n_boy(x1) & into(e1,x2) & Actor(e1,x1) & v_jump(e1))
exists e1 s1 x1 x2.(into(e1,x2) & n_pool(x2) & a_empty(s1) & Theme(s1,x2) & Actor(e1,x1) & v_jump(e1) & n_boy(x1))