A dog and a cow play in the fallen snow on a farm.
Those pigs are loose in the city.
A dog and a cow is are not pigs.
exists s1 s2 x1 x2 x3 x4 x5.(n_snow(x4) & a_fallen(s2) & Theme(s2,x4) & a_topic(s1) & subset_of(x2,s1) & on(x2,x5) & n_farm(x5) & in(x2,x4) & n_play(x2) & of(x2,x3) & n_cow(x3) & subset_of(x1,s1) & n_dog(x1))
exists s1 x1 x2.(n_city(x2) & n_pig(x1) & in(s1,x2) & Theme(s1,x1) & a_loose(s1))