A public worker is sweeping up a massive pile of trash in front of a monument at a city square.
A government worker sweeps trash away from a monument after a riot
The public worker doesn't necessarily work for the government and  the trash pile may have accumulated because many different events, with it being after a riot as only one option.
exists e1 s1 s2 s3 x1 x2 x3 x4 x5 x6 x7.(at(e1,x6) & n_square(x6) & of(x6,x7) & n_city(x7) & in(e1,x4) & of(x4,x5) & n_monument(x5) & n_front(x4) & a_up(s3) & Manner(e1,s3) & Theme(e1,x2) & Actor(e1,x1) & v_sweep(e1) & of(x2,x3) & n_trash(x3) & n_pile(x2) & a_massive(s2) & Theme(s2,x2) & n_worker(x1) & a_public(s1) & Theme(s1,x1))
exists e1 x1 x2 x3 x4 x5.(after(e1,x5) & n_riot(x5) & from(e1,x4) & n_monument(x4) & r_away(e1) & Theme(e1,x3) & Actor(e1,x1) & v_sweep(e1) & n_trash(x3) & n_worker(x1) & of(x1,x2) & n_government(x2))