Table: wellington_rail_stations
Columns: station
metlink_code
line_s
service_s
serves
km_from_wellington
fare_zone_s
opened

Question: what is the km from wellington where the metlink code is mast?
SQL: SELECT "km_from_wellington" FROM wellington_rail_stations WHERE "metlink_code" = 'MAST'

Question: what is the name of the station where the metlink code is mata?
SQL: SELECT "station" FROM wellington_rail_stations WHERE "metlink_code" = 'MATA'

Question: what is the metlink code that opened in 1908?
SQL: SELECT "metlink_code" FROM wellington_rail_stations WHERE "opened" = '1908'