a man walking down an alleyway
The man is a police officer.
It cannot be inferred that the man in the alleyway is a police officer.
exists e1 s1 x1 x2 x3.(a_topic(x1) & a_down(s1) & Manner(e1,s1) & Theme(e1,x3) & Actor(e1,x2) & v_walk(e1) & n_alleyway(x3) & (x1 = x2) & n_man(x1))
exists p1 x1.(n_man(x1) & exists x2 x3.((x1 = x2) & n_officer(x2) & of(x2,x3) & n_police(x3)))