A dog runs through a field.
One dog runs through the yard.
A dog and one dog mean the same thing.  A yard could be a field.
exists e1 x1 x2.(through(e1,x2) & n_field(x2) & Actor(e1,x1) & v_run(e1) & n_dog(x1))
exists e1 x1 x2.(n_yard(x2) & through(e1,x2) & Actor(e1,x1) & v_run(e1) & n_dog(x1) & card_eq_1(x1))