Name the winners of the mens doubles in the season of 1963/64.
CREATE TABLE table_28211988_4 (
    mens_doubles VARCHAR,
    season VARCHAR
)
SELECT mens_doubles FROM table_28211988_4 WHERE season = "1963/64"
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: Name the winners of the mens doubles in the season of 1963/64. ### Input: CREATE TABLE table_28211988_4 (
    mens_doubles VARCHAR,
    season VARCHAR
) ### Response: SELECT mens_doubles FROM table_28211988_4 WHERE season = "1963/64"