Two dogs chasing a plastic bag.
Two dogs race after a bag.
Chasing is a synonym for race.
exists e1 x1 x2 x3 x4.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_chase(e1) & n_bag(x3) & of(x3,x4) & n_plastic(x4) & (x1 = x2) & n_dog(x1) & card_eq_2(x1))
exists x1 x2 x3.(a_topic(x1) & after(x1,x3) & n_bag(x3) & n_race(x1) & of(x1,x2) & n_dog(x2) & card_eq_2(x1))