The dog is carrying a toy through the grass.
A dog carries his favorite teddy bear to his master.
There are many dog toys besides a dog's  teddy bear, favorite or otherwise.  The destination of the dog going through the grass could be his master or one of many other options.
exists e1 x1 x2 x3.(n_grass(x3) & n_dog(x1) & through(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_carry(e1) & n_toy(x2))
exists e1 s1 s2 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_carry(e1) & to(x2,x3) & n_master(x3) & of(x3,x1) & n_male(x1) & n_male(x1) & n_bear(x2) & a_teddy(s2) & Theme(s2,x2) & a_favorite(s1) & Theme(s1,x2) & of(x2,x1) & n_dog(x1))