Two dogs swimming in a pool.
Two dogs swimming after a ball that fell into the pool.
Dogs in a pool may not have fell into the pool.
exists e1 x1 x2 x3.(a_topic(x1) & in(e1,x3) & n_pool(x3) & Actor(e1,x2) & v_swim(e1) & (x1 = x2) & n_dog(x1) & card_eq_2(x1))
exists e2 e1 x1 x2 x3 x4 x5.(n_pool(x5) & a_topic(x1) & after(e1,x3) & into(e2,x5) & Actor(e2,x4) & v_fall(e2) & (x3 = x4) & n_ball(x3) & Actor(e1,x2) & v_swim(e1) & (x1 = x2) & n_dog(x1) & card_eq_2(x1))