Two dogs run side-by-side on the grass.
a pair of dogs track a rabbit
Two dogs running side-by-side doesn't mean they are tracking a rabbit.
exists e1 s1 x1 x2.(n_grass(x2) & on(e1,x2) & a_side-by-side(s1) & Manner(e1,s1) & Actor(e1,x1) & v_run(e1) & n_dog(x1) & card_eq_2(x1))
exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_track(e1) & n_rabbit(x3) & of(x1,x2) & n_dog(x2) & n_pair(x1))