Count the number of different countries that climbers are from.
CREATE TABLE climber (
    climber_id number,
    name text,
    country text,
    time text,
    points number,
    mountain_id number
)

CREATE TABLE mountain (
    mountain_id number,
    name text,
    height number,
    prominence number,
    range text,
    country text
)
SELECT COUNT(DISTINCT country) FROM climber
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: Count the number of different countries that climbers are from. ### Input: CREATE TABLE climber (
    climber_id number,
    name text,
    country text,
    time text,
    points number,
    mountain_id number
)

CREATE TABLE mountain (
    mountain_id number,
    name text,
    height number,
    prominence number,
    range text,
    country text
) ### Response: SELECT COUNT(DISTINCT country) FROM climber