What is the total number of drivers who have cars constructed by Mercedes-Benz?
CREATE TABLE table_1969 (
    "Year" real,
    "Formula" text,
    "Driver" text,
    "Constructor" text,
    "Location" text,
    "Report" text
)
SELECT COUNT("Driver") FROM table_1969 WHERE "Constructor" = 'Mercedes-Benz'
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 is the total number of drivers who have cars constructed by Mercedes-Benz? ### Input: CREATE TABLE table_1969 (
    "Year" real,
    "Formula" text,
    "Driver" text,
    "Constructor" text,
    "Location" text,
    "Report" text
) ### Response: SELECT COUNT("Driver") FROM table_1969 WHERE "Constructor" = 'Mercedes-Benz'