When was the release date of the operating system with kernel version 2.6.31?
CREATE TABLE table_22917 (
    "Version" text,
    "Code name" text,
    "Release date" text,
    "Desktops" text,
    "Servers" text,
    "Kernel Version" text
)
SELECT "Release date" FROM table_22917 WHERE "Kernel Version" = '2.6.31'
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: When was the release date of the operating system with kernel version 2.6.31? ### Input: CREATE TABLE table_22917 (
    "Version" text,
    "Code name" text,
    "Release date" text,
    "Desktops" text,
    "Servers" text,
    "Kernel Version" text
) ### Response: SELECT "Release date" FROM table_22917 WHERE "Kernel Version" = '2.6.31'