Dogs fight in grass over toy.
Two cats fight of a ball of yarn.
Dogs and cats are different animals.
exists e1 x1 x2 x3 x4.(in(e1,x3) & over(x3,x4) & n_toy(x4) & n_grass(x3) & Theme(e1,x2) & Actor(e1,x1) & v_fight(e1) & n_thing(x2) & n_dog(x1))
exists x1 x2 x3 x4.(a_topic(x1) & of(x1,x3) & of(x3,x4) & n_yarn(x4) & n_ball(x3) & n_fight(x1) & of(x1,x2) & n_cat(x2) & card_eq_2(x1))