Men unlocking a gate for a train.
there is a man in outdoor.
If the men are unlocking a gate for a train, there must be a man outdoors since gates and trains are located outside.
exists e1 x1 x2 x3.(ne_nam_men(x1) & Theme(e1,x2) & Actor(e1,x1) & v_unlock(e1) & for(x2,x3) & n_train(x3) & n_gate(x2))
exists p1 x1 x2.(in(p1,x2) & n_outdoor(x2) & exists x3.((x1 = x3) & n_man(x3)))