Four police officers are swallowed up by the large crowd of people on the street.
The four officers work their way into the crowd.
Work their way into the crowd is another way of saying swallowed up by the crowd
exists e1 s1 s2 x1 x2 x3 x4 x5.(n_street(x5) & n_crowd(x3) & a_large(s2) & Theme(s2,x3) & Actor(e1,x3) & on(x3,x5) & of(x3,x4) & n_people(x4) & a_up(s1) & Manner(e1,s1) & Theme(e1,x1) & v_swallow(e1) & n_officer(x1) & of(x1,x2) & n_police(x2) & card_eq_4(x1))
exists e1 x1 x2 x3.(n_crowd(x3) & n_way(x2) & of(x2,x1) & n_thing(x1) & n_officer(x1) & card_eq_4(x1) & into(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_work(e1))