What was the average election year that has less than 136 deputies, and 1,560,753 votes received?
CREATE TABLE table_6214 (
    "Election date" real,
    "Party leader" text,
    "Number of votes received" text,
    "Percentage of votes" text,
    "Number of deputies" real
)
SELECT AVG("Election date") FROM table_6214 WHERE "Number of deputies" < '136' AND "Number of votes received" = '1,560,753'
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 was the average election year that has less than 136 deputies, and 1,560,753 votes received? ### Input: CREATE TABLE table_6214 (
    "Election date" real,
    "Party leader" text,
    "Number of votes received" text,
    "Percentage of votes" text,
    "Number of deputies" real
) ### Response: SELECT AVG("Election date") FROM table_6214 WHERE "Number of deputies" < '136' AND "Number of votes received" = '1,560,753'