A dog chews on his red leash.
There is something in his mouth.
His refers to the dog. If someone chews he has something in his mouth.
exists e1 s1 x1 x2.(on(e1,x2) & n_leash(x2) & a_red(s1) & Theme(s1,x2) & of(x2,x1) & n_male(x1) & Actor(e1,x1) & v_chew(e1) & n_dog(x1))
exists p1 x1 x2 x3.((x1 = x2) & in(x2,x3) & n_mouth(x3) & of(x3,x2) & n_male(x2) & n_thing(x2))