Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_22481967_1 (number VARCHAR, operator VARCHAR)
### Question:
List the number for the operator melbourne and metropolitan tramways board.
### Answer:
SELECT number FROM table_22481967_1 WHERE operator = "Melbourne and Metropolitan Tramways Board"