The dogs fight over the red and pink ball.
There are some dogs.
Pink ball was caught by dogs.
exists s1 s2 x1 x2 x3.(n_ball(x3) & a_pink(s2) & Theme(s2,x3) & a_red(s1) & Theme(s1,x3) & n_fight(x1) & of(x1,x2) & n_dog(x2) & a_topic(x1) & over(x1,x3))
exists p1 x1 x2.((x1 = x2) & n_dog(x2))