Construction workers are working in a tunnel.
The men are building another tunnel.
There is nothing to indicate that the construction workers are building another tunnel.
exists e1 x1 x2 x3.(in(e1,x3) & n_tunnel(x3) & Actor(e1,x1) & v_work(e1) & n_worker(x1) & of(x1,x2) & n_construction(x2))
exists e1 x1 x2 x3.(n_tunnel(x2) & n_man(x1) & Theme(e1,x3) & Actor(e1,x1) & v_build(e1) & n_tunnel(x3) & -(x3 = x2))