A man in a swimming pool holds a smiling boy in a flotation device.
An empty pool.
In first sentence, "a man in swimming pool" without water man cat swim. so the pool is full of water but in second sentence" the pol is empty" so no water. So these sentence are contradict.
exists e1 e2 x1 x2 x3 x4 x5 x6.(Theme(e2,x4) & Actor(e2,x1) & v_hold(e2) & in(x4,x5) & n_device(x5) & of(x5,x6) & n_flotation(x6) & n_boy(x4) & Actor(e1,x4) & v_smile(e1) & in(x1,x2) & n_pool(x2) & of(x2,x3) & n_swimming(x3) & n_man(x1))
exists s1 x1.(a_topic(x1) & n_pool(x1) & a_empty(s1) & Theme(s1,x1))