Two dogs run through a field.
Two dogs playing with each other
Just because two dogs are in the same location does not imply that they are playing with each other.
exists e1 x1 x2.(through(e1,x2) & n_field(x2) & Actor(e1,x1) & v_run(e1) & n_dog(x1) & card_eq_2(x1))
exists e1 x1 x2.(a_topic(x1) & all x3.(n_other(x3) -> with(e1,x3)) & Actor(e1,x2) & v_play(e1) & (x1 = x2) & n_dog(x1) & card_eq_2(x1))