A brown dog is being attacked by two other dogs.
two dogs chase a cat
If two dogs are attacking another dog, then the two dogs are not chasing a cat.
exists e1 s1 x1 x2.(Actor(e1,x2) & -(x2 = x1) & n_dog(x1) & n_dog(x1) & n_dog(x2) & card_eq_2(x2) & Theme(e1,x1) & v_attack(e1) & a_brown(s1) & Theme(s1,x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_chase(e1) & n_cat(x2) & n_dog(x1) & card_eq_2(x1))