construction workers working inside of a railway tunnel.
The workers are outside
Workers inside a subway tunnel are not outside, as outside implies in open air.
exists e1 s1 x1 x2 x3 x4.(of(e1,x3) & n_tunnel(x3) & of(x3,x4) & n_railway(x4) & a_inside(s1) & Manner(e1,s1) & Actor(e1,x1) & v_work(e1) & n_worker(x1) & of(x1,x2) & n_construction(x2))
exists s1 x1.(n_worker(x1) & Theme(s1,x1) & a_outside(s1))