Construction workers with safety vests and hats are doing repairs in a tunnel.
The tunnel is permanently sealed off.
The tunnel cannot be permanently sealed off and have workers doing repairs.
exists e1 x1 x2 x3 x4 x5 x6 x7 x8.(in(e1,x8) & n_tunnel(x8) & Theme(e1,x7) & Actor(e1,x1) & v_do(e1) & n_repair(x7) & with(x1,x3) & n_hat(x6) & n_vest(x5) & subset_of(x6,x3) & subset_of(x5,x3) & of(x3,x4) & n_safety(x4) & n_worker(x1) & of(x1,x2) & n_construction(x2))
exists e1 s1 s2 x1.(n_tunnel(x1) & a_permanently(s2) & Manner(e1,s2) & a_off(s1) & Manner(e1,s1) & Theme(e1,x1) & v_seal(e1))