Table: steam_locomotives_ireland
Columns: type
fleet_numbers
quantity_made
manufacturer
date_made

Question: When was the railmotor made?
SQL: SELECT "date_made" FROM steam_locomotives_ireland WHERE "type" = 'railmotor'

Question: What are the fleet number for the 4-6-4t locomotive?
SQL: SELECT "fleet_numbers" FROM steam_locomotives_ireland WHERE "type" = '4-6-4t'