A policeman is talking to a little crowd.
A cop addresses a group of people.
The person is a cop because he/she is a policeman.
exists e1 s1 x1 x2.(to(e1,x2) & n_crowd(x2) & a_little(s1) & Theme(s1,x2) & Actor(e1,x1) & v_talk(e1) & n_policeman(x1))
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_address(e1) & of(x2,x3) & n_people(x3) & n_group(x2) & n_cop(x1))