Dad enjoying with his in the swimming pool.
Dad not enjoying the swimming pool
He can't be enjoying and not enjoying.
exists e1 x1 x2 x3 x4.(n_pool(x3) & of(x3,x4) & n_swimming(x4) & ne_nam_dad(x1) & in(e1,x3) & with(e1,x2) & n_his(x2) & Actor(e1,x1) & v_enjoy(e1))
exists x1 x2 x3.(n_pool(x2) & of(x2,x3) & n_swimming(x3) & ne_nam_dad(x1) & -exists e1.(Theme(e1,x2) & Actor(e1,x1) & v_enjoy(e1)))