In how many different years was the team nicknamed Comets founded?
CREATE TABLE table_28243691_2 (
    founded VARCHAR,
    team_nickname VARCHAR
)
SELECT COUNT(founded) FROM table_28243691_2 WHERE team_nickname = "Comets"
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: In how many different years was the team nicknamed Comets founded? ### Input: CREATE TABLE table_28243691_2 (
    founded VARCHAR,
    team_nickname VARCHAR
) ### Response: SELECT COUNT(founded) FROM table_28243691_2 WHERE team_nickname = "Comets"