The category "<bare_vehicle_id>" can be expressed as follows:

<bare_vehicle_id>

<aircraft_type-pl> <id_num-pl>

<aircraft_type-sing> <id_num-sing>

<ordinal-pl> <aircraft_type-pl>

<ordinal-pl> <vehicle_type-pl>

<ordinal-sing> <aircraft_type-sing>

<ordinal-sing> <vehicle_type-sing>

<vehicle_type-pl> <id_num-pl>

<vehicle_type-sing> <id_num-sing>