how man c windmills have there been ?
CREATE TABLE table_204_929 (
    id number,
    "location" text,
    "name of mill and\ngrid reference" text,
    "type" text,
    "maps" text,
    "first mention\nor built" text,
    "last mention\nor demise" number
)
SELECT COUNT(*) FROM table_204_929
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: how man c windmills have there been ? ### Input: CREATE TABLE table_204_929 (
    id number,
    "location" text,
    "name of mill and\ngrid reference" text,
    "type" text,
    "maps" text,
    "first mention\nor built" text,
    "last mention\nor demise" number
) ### Response: SELECT COUNT(*) FROM table_204_929