A blond dog runs in the grass holding a stick in its mouth.
A dog is returning a stick that its owner had thrown for it.
Just because, the dog is holding a stick in its mouth does not mean the dog is returning the stick.
exists e1 s1 x1 x2 x3 x4 x5 x6.(n_mouth(x6) & of(x6,x3) & n_thing(x3) & n_grass(x3) & a_topic(x1) & in(x1,x3) & in(e1,x6) & Theme(e1,x5) & Actor(e1,x4) & v_hold(e1) & n_stick(x5) & (x3 = x4) & n_run(x1) & of(x1,x2) & n_dog(x2) & a_blond(s1) & Theme(s1,x1))
exists e1 p1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_return(e1) & Topic(x2,p1) & exists e2.(for(e2,x1) & Actor(e2,x3) & v_throw(e2)) & n_thing(x1) & n_thing(x1) & n_owner(x3) & of(x3,x1) & n_stick(x2) & n_dog(x1))