A young boy is swimming in a pool.
The boy is sleeping.
One cannot be swimming and sleeping at the same time.
exists e1 s1 x1 x2.(in(e1,x2) & n_pool(x2) & Actor(e1,x1) & v_swim(e1) & n_boy(x1) & a_young(s1) & Theme(s1,x1))
exists e1 x1.(n_boy(x1) & Actor(e1,x1) & v_sleep(e1))