a black cow and a brown cow being chased by a dog
The dog is chasing two lambs.
If a dog is chasing two lambs, he's not chasing a cow.
exists e1 s1 s2 s3 x1 x2 x3 x4.(a_topic(s1) & subset_of(x2,s1) & Actor(e1,x4) & n_dog(x4) & Theme(e1,x3) & v_chase(e1) & (x2 = x3) & n_cow(x2) & a_brown(s3) & Theme(s3,x2) & subset_of(x1,s1) & n_cow(x1) & a_black(s2) & Theme(s2,x1))
exists e1 x1 x2.(n_dog(x1) & Theme(e1,x2) & Actor(e1,x1) & v_chase(e1) & n_lamb(x2) & card_eq_2(x2))