Table: steam_locomotives_ireland_4
Columns: class
type
fleet_numbers
quantity_made
manufacturer
date_made
date_withdrawn

Question: Which locomotive class had 5 items made?
SQL: SELECT "class" FROM steam_locomotives_ireland_4 WHERE "quantity_made" = 5

Question: Which manufacturer made a locomotive with a type of 4-6-4t?
SQL: SELECT "manufacturer" FROM steam_locomotives_ireland_4 WHERE "type" = '4-6-4t'