Two small white and brown dogs bound in unison.
The dogs belong to the same owner.
Dogs running together conveys no sense that they belong to the same owner, they could have met at a dogpark, in daycare, on the beach, etc, and have different owners or the same one.
exists e1 s1 s2 s3 x1 x2.(in(e1,x2) & n_unison(x2) & Theme(e1,x1) & v_bind(e1) & n_dog(x1) & a_brown(s3) & Theme(s3,x1) & a_white(s2) & Theme(s2,x1) & a_small(s1) & Theme(s1,x1) & card_eq_2(x1))
exists e1 s1 x1 x2.(n_owner(x2) & a_same(s1) & Theme(s1,x2) & n_dog(x1) & to(e1,x2) & Actor(e1,x1) & v_belong(e1))