Workers in orange vest painting an underground railway.
Humans in a vest.
Workers are humans and orange vest is a vest.
exists e1 s1 x1 x2 x3 x4 x5.(a_topic(x1) & in(x1,x2) & Theme(e1,x5) & Actor(e1,x4) & v_paint(e1) & n_railway(x5) & a_underground(s1) & Theme(s1,x5) & (x2 = x4) & n_vest(x2) & of(x2,x3) & n_orange(x3) & n_worker(x1))
exists s1 x1.(ne_nam_humans(s1) & a_topic(s1) & in(s1,x1) & n_vest(x1))