Men in orange doing clean up beside of a subway.
The prisoners are picking up litter.
Men in orange can be prisoners. Not all men in orange are prisoners. Prisoners who clean up may be picking up litter. Men in orange can be picking up litter. Prisoners are not necessarily picking up litter. Men in orange are not necessarily picking up litter.
exists e1 s1 x1 x2 x3 x4 x5.(a_topic(x1) & of(e1,x5) & n_subway(x5) & r_beside(e1) & a_up(s1) & Manner(e1,s1) & Theme(e1,x4) & Actor(e1,x3) & v_do(e1) & n_clean(x4) & (x1 = x3) & in(x1,x2) & n_orange(x2) & n_man(x1))
exists e1 s1 x1 x2.(n_prisoner(x1) & a_up(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_pick(e1) & n_litter(x2))