what is the total viewers (m) when the rating is 6.4 and the share is more than 11?
CREATE TABLE table_56999 (
    "Episode" text,
    "Air date" text,
    "Rating" real,
    "Share" real,
    "18-49 (Rating/Share)" text,
    "Viewers (m)" real,
    "Rank (timeslot)" text
)
SELECT COUNT("Viewers (m)") FROM table_56999 WHERE "Rating" = '6.4' AND "Share" > '11'
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 viewers (m) when the rating is 6.4 and the share is more than 11? ### Input: CREATE TABLE table_56999 (
    "Episode" text,
    "Air date" text,
    "Rating" real,
    "Share" real,
    "18-49 (Rating/Share)" text,
    "Viewers (m)" real,
    "Rank (timeslot)" text
) ### Response: SELECT COUNT("Viewers (m)") FROM table_56999 WHERE "Rating" = '6.4' AND "Share" > '11'