The black and white dog runs through the field.
A cat running in the city.
A dog and cat are different animals and there is probably not a field in the city.
exists e1 s1 s2 x1 x2.(n_field(x2) & n_dog(x1) & a_white(s2) & Theme(s2,x1) & a_black(s1) & Theme(s1,x1) & through(e1,x2) & Actor(e1,x1) & v_run(e1))
exists e1 x1 x2 x3.(n_city(x3) & a_topic(x1) & in(e1,x3) & Actor(e1,x2) & v_run(e1) & (x1 = x2) & n_cat(x1))