Two city workers working on something outside.
Two women put up safety signs for the city.
City workers do not have to be women , while working outside does not mean safety signs for the city.
exists e1 s1 x1 x2 x3 x4.(on(e1,x3) & Theme(s1,x4) & a_outside(s1) & (x3 = x4) & n_thing(x3) & Actor(e1,x1) & v_work(e1) & n_worker(x1) & of(x1,x2) & n_city(x2) & card_eq_2(x1))
exists e1 s1 x1 x2 x3 x4.(n_city(x4) & a_up(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_put(e1) & for(x2,x4) & n_sign(x2) & of(x2,x3) & n_safety(x3) & n_woman(x1) & card_eq_2(x1))