The dogs fight over the red and pink ball.
The dogs are playing.
You can not infer they are playing.
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 e1 x1.(n_dog(x1) & Actor(e1,x1) & v_play(e1))