I have read here (sintra-portugal.com/guides/sintra-bus-434.ht…) that you can buy a combined ticket that takes you via train from Lisbon (Rossio I guess?) to Sintra and also includes the 434 tourist bus once at Sintra. How does this work exactly? Does it get added to the Vivi Viagem card? What do you ask for at the station when buying>?