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CREATE TABLE table_22481967_1 (builder VARCHAR, withdrawn VARCHAR, number VARCHAR)
### Question:
List the number of builders where the withdrawn is 1951 and number is 42.
### Answer:
SELECT COUNT(builder) FROM table_22481967_1 WHERE withdrawn = "1951" AND number = "42"