The giraffe's mouth is closed.
The giraffe did not move its mouth.
If the giraffe's mouth is closed, he could still be moving (like chewing). The mouth being closed does not mean that he did not move his mouth
exists e1 x1 x2.(n_mouth(x2) & of(x2,x1) & n_giraffe(x1) & Theme(e1,x2) & v_close(e1))
exists x1 x2.(n_mouth(x2) & of(x2,x1) & n_thing(x1) & n_giraffe(x1) & -exists e1.(Theme(e1,x2) & Actor(e1,x1) & v_move(e1)))