WHich Tournament has a Finalist of marat safin (12)?
CREATE TABLE table_50866 (
    "Tournament" text,
    "Surface" text,
    "Week" text,
    "Winner" text,
    "Finalist" text,
    "Semifinalists" text
)
SELECT "Tournament" FROM table_50866 WHERE "Finalist" = 'marat safin (12)'
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: WHich Tournament has a Finalist of marat safin (12)? ### Input: CREATE TABLE table_50866 (
    "Tournament" text,
    "Surface" text,
    "Week" text,
    "Winner" text,
    "Finalist" text,
    "Semifinalists" text
) ### Response: SELECT "Tournament" FROM table_50866 WHERE "Finalist" = 'marat safin (12)'