Table schema:
CREATE TABLE table_name_95 (fleet_number_s_ VARCHAR, class VARCHAR, quantity_preserved VARCHAR, quantity_made VARCHAR)

Question: What is Fleet Number(s), when Quantity Preserved is "0", when Quantity Made is 1, and when Class is "Z"?
SQL: SELECT fleet_number_s_ FROM table_name_95 WHERE quantity_preserved = "0" AND quantity_made = "1" AND class = "z"