A small dog is carrying a stick in his mouth.
a dog playing fetch
Just because a dog gave a stick in his mouth doesn't mean it's playing fetch.
exists e1 s1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_carry(e1) & in(x2,x3) & n_mouth(x3) & of(x3,x1) & n_male(x1) & n_stick(x2) & n_dog(x1) & a_small(s1) & Theme(s1,x1))
exists e1 x1 x2.(Actor(e1,x1) & v_fetch(e1) & n_playing(x1) & of(x1,x2) & n_dog(x2))