what were the number of tracks that contained no lead vocals ?
CREATE TABLE table_204_932 (
    id number,
    "#" number,
    "title" text,
    "time" text,
    "lead vocals" text,
    "notes" text
)
SELECT COUNT(*) FROM table_204_932 WHERE "lead vocals" IS NULL
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 were the number of tracks that contained no lead vocals ? ### Input: CREATE TABLE table_204_932 (
    id number,
    "#" number,
    "title" text,
    "time" text,
    "lead vocals" text,
    "notes" text
) ### Response: SELECT COUNT(*) FROM table_204_932 WHERE "lead vocals" IS NULL