What was the ranking of the season finale aired on May 8, 2006?
CREATE TABLE table_15924 (
    "Season" text,
    "Network" text,
    "Season premiere" text,
    "Season finale" text,
    "TV season" text,
    "Ranking" text,
    "Viewers (in millions)" text
)
SELECT "Ranking" FROM table_15924 WHERE "Season finale" = 'May 8, 2006'
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: What was the ranking of the season finale aired on May 8, 2006? ### Input: CREATE TABLE table_15924 (
    "Season" text,
    "Network" text,
    "Season premiere" text,
    "Season finale" text,
    "TV season" text,
    "Ranking" text,
    "Viewers (in millions)" text
) ### Response: SELECT "Ranking" FROM table_15924 WHERE "Season finale" = 'May 8, 2006'