The men are talking to the person in the police van.
There are men talking to someone.
A person is someone.
exists e1 x1 x2 x3 x4.(n_van(x3) & of(x3,x4) & n_police(x4) & n_person(x2) & n_man(x1) & to(e1,x2) & in(x2,x3) & Actor(e1,x1) & v_talk(e1))
exists p1 x1 e1 x2 x3 x4.((x1 = x2) & to(e1,x4) & n_person(x4) & Actor(e1,x3) & v_talk(e1) & (x2 = x3) & n_man(x2))