These are construction workers with orange safety vests working on in a British Underground.
The British Underground is delayed because construction workers are working on it.
How is that delayed if they are working on it? No indication of delays.
exists e1 p1 s1 s2 x1.(for(p1,e1) & in(e1,x1) & n_underground(x1) & a_british(s2) & Theme(s2,x1) & a_on(s1) & Manner(e1,s1) & Actor(e1,x1) & v_work(e1) & exists x2 x3 x4 x5 x6.((x1 = x2) & with(x2,x4) & n_vest(x4) & of(x4,x6) & n_safety(x6) & of(x4,x5) & n_orange(x5) & n_worker(x2) & of(x2,x3) & n_construction(x3)) & n_thing(x1))
exists e1 p1 s1 x1.(n_thing(x1) & n_underground(x1) & a_british(s1) & Theme(s1,x1) & exists e2 x2 x3.(on(e2,x1) & Actor(e2,x2) & v_work(e2) & n_worker(x2) & of(x2,x3) & n_construction(x3)) & because(e1,p1) & Theme(e1,x1) & v_delay(e1))