The brown dog is walking through a river surrounded by bushes.
A hunting dog is helping its owner track down a fox in the woods.
A brown dog is not necessarily a hunting dog; walking through a river doesn't necessarily mean the dog is trying to track down a fox.
exists e2 e1 s1 x1 x2 x3 x4.(n_dog(x1) & a_brown(s1) & Theme(s1,x1) & through(e1,x2) & Actor(e2,x4) & n_bush(x4) & Theme(e2,x3) & v_surround(e2) & (x2 = x3) & n_river(x2) & Actor(e1,x1) & v_walk(e1))
exists e1 x1 x2 x3 x4 x5 x6.(n_wood(x6) & in(e1,x6) & down(e1,x5) & n_fox(x5) & Theme(e1,x3) & Actor(e1,x1) & v_help(e1) & n_track(x3) & of(x3,x4) & n_owner(x4) & of(x3,x1) & n_thing(x1) & n_dog(x1) & of(x1,x2) & n_hunting(x2))