Men unlocking a gate for a train.
The man opening gate for the train.
Opening a gate doesn't mean the gate was locked.
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 e1 x1 x2 x3 x4.(n_train(x4) & n_man(x1) & a_topic(x1) & for(e1,x4) & Theme(e1,x3) & Actor(e1,x2) & v_open(e1) & n_gate(x3) & (x1 = x2))