How many people attended the match when Manchester United played against the Hearts?
CREATE TABLE table_76997 (
    "Date" text,
    "Opponents" text,
    "H / A" text,
    "Result F \u2013 A" text,
    "Attendance" real
)
SELECT SUM("Attendance") FROM table_76997 WHERE "Opponents" = 'hearts'
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 many people attended the match when Manchester United played against the Hearts? ### Input: CREATE TABLE table_76997 (
    "Date" text,
    "Opponents" text,
    "H / A" text,
    "Result F \u2013 A" text,
    "Attendance" real
) ### Response: SELECT SUM("Attendance") FROM table_76997 WHERE "Opponents" = 'hearts'