A policeman is standing outside a church.
A policeman in uniform is standing outside.
A policeman does not have to be in uniform.
exists e1 x1 x2.(outside(e1,x2) & n_church(x2) & Actor(e1,x1) & v_stand(e1) & n_policeman(x1))
exists e1 s1 x1 x2.(a_outside(s1) & Manner(e1,s1) & Actor(e1,x1) & v_stand(e1) & in(x1,x2) & n_uniform(x2) & n_policeman(x1))