A large orange dog runs through the grass by the water where a large boat is sailing in the background.
A dog is fetching a stick near a large lake.
Just because a dog is running through the grass does not mean it is fetching a stick. Not all bodies of water are lakes, and similarly not all lakes are large.
exists e1 p1 s1 x1 x2 x3 x4 x6.(n_background(x6) & n_water(x4) & n_grass(x3) & by(e1,x4) & exists e2 s2 x5.(in(e2,x6) & Actor(e2,x5) & v_sail(e2) & n_boat(x5) & a_large(s2) & Theme(s2,x5)) & where(x4,p1) & through(e1,x3) & Actor(e1,x1) & v_run(e1) & n_dog(x1) & of(x1,x2) & n_orange(x2) & a_large(s1) & Theme(s1,x1))
exists e1 s1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_fetch(e1) & near(x2,x3) & n_lake(x3) & a_large(s1) & Theme(s1,x3) & n_stick(x2) & n_dog(x1))