A man is doing some kind of maintenance work on a train.
The passengers are waiting for a bus.
A man is one person and passengers means more than one so both can't be true at the same time.
exists e1 x1 x2 x3 x4 x5.(Theme(e1,x2) & Actor(e1,x1) & v_do(e1) & of(x2,x3) & on(x3,x5) & n_train(x5) & n_work(x3) & of(x3,x4) & n_maintenance(x4) & n_kind(x2) & n_man(x1))
exists e1 x1 x2.(n_passenger(x1) & for(e1,x2) & n_bus(x2) & Actor(e1,x1) & v_wait(e1))