search for two tickets on tuesday's train to paris
búscame dos billetes en el tren del martes a santander
search for two tickets on <a>tuesday's<a> <c>train<c> to <b>paris<b>
búscame dos billetes en el <c>tren<c> <a>del martes<a> a <b>santander<b>
o o o o o b-date b-transport_type o b-place_name
o o o o o b-transport_type b-date i-date o b-place_name