A large brown dog and a small gray dog on a rocky surface with weeds behind them.
A large dog and a small gray dog on a rocky surface with weeds behind them.
The two sentences are basically the same with a little bit more description about the dog in the first.
exists s1 s2 s3 s4 s5 s6 x1 x2 x3 x4.(a_topic(s1) & subset_of(x2,s1) & on(x2,x3) & with(x3,x4) & behind(x4,x1) & n_thing(x1) & n_weed(x4) & n_surface(x3) & a_rocky(s6) & Theme(s6,x3) & n_dog(x2) & a_gray(s5) & Theme(s5,x2) & a_small(s4) & Theme(s4,x2) & subset_of(x1,s1) & n_dog(x1) & a_brown(s3) & Theme(s3,x1) & a_large(s2) & Theme(s2,x1))
exists s1 s2 s3 s4 s5 x1 x2 x3 x4.(a_topic(s1) & subset_of(x2,s1) & on(x2,x3) & with(x3,x4) & behind(x4,x1) & n_thing(x1) & n_weed(x4) & n_surface(x3) & a_rocky(s5) & Theme(s5,x3) & n_dog(x2) & a_gray(s4) & Theme(s4,x2) & a_small(s3) & Theme(s3,x2) & subset_of(x1,s1) & n_dog(x1) & a_large(s2) & Theme(s2,x1))