Two dogs play fighting on sand.
The dogs are fighting.
Two dogs is a number of dogs, and they are fighting.
exists e1 e2 x1 x2.(for(e1,e2) & on(e2,x2) & n_sand(x2) & Actor(e2,x1) & v_fight(e2) & Actor(e1,x1) & v_play(e1) & n_dog(x1) & card_eq_2(x1))
exists e1 x1.(n_dog(x1) & Actor(e1,x1) & v_fight(e1))