a boy wears a red coat.
The boy is wearing a coat.
The same boy is wearing a coat, therefore it must be a red coat.
exists e1 s1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_wear(e1) & n_coat(x2) & a_red(s1) & Theme(s1,x2) & n_boy(x1))
exists e1 x1 x2.(n_boy(x1) & Theme(e1,x2) & Actor(e1,x1) & v_wear(e1) & n_coat(x2))