The big dog has a green toy in its mouth.
A dog is bringing a toy to its owner.
A dog with a toy in its mouth doesn't necessarily mean he is bringing a toy to its owner.
exists e1 s1 s2 x1 x2 x3.(n_mouth(x3) & of(x3,x1) & n_thing(x1) & n_dog(x1) & a_big(s1) & Theme(s1,x1) & Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & in(x2,x3) & n_toy(x2) & a_green(s2) & Theme(s2,x2))
exists e1 x1 x2 x3.(to(e1,x3) & n_owner(x3) & of(x3,x1) & n_thing(x1) & Theme(e1,x2) & Actor(e1,x1) & v_bring(e1) & n_toy(x2) & n_dog(x1))