get me a train ticket to chicago today
consígueme un billete de tren a huesca hoy
get me a <c>train<c> ticket to <b>chicago<b> <a>today<a>
consígueme un billete de <c>tren<c> a <b>huesca<b> <a>hoy<a>
o o o b-transport_type o o b-place_name b-date
o o o o b-transport_type o b-place_name b-date