The brown dog is walking through a river surrounded by bushes.
A brown dog searching for a rabbit.
Walking through a river doesn't necessarily mean the dog is searching for a rabbit.
exists e1 e2 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 s1 x1 x2 x3.(a_topic(x1) & for(e1,x3) & n_rabbit(x3) & Actor(e1,x2) & v_search(e1) & (x1 = x2) & n_dog(x1) & a_brown(s1) & Theme(s1,x1))