Name the number of years for womens doubles being diana koleva emilia dimitrova and jeliazko valkov
CREATE TABLE table_19663 (
    "Year" real,
    "Mens singles" text,
    "Womens singles" text,
    "Mens doubles" text,
    "Womens doubles" text,
    "Mixed doubles" text
)
SELECT COUNT("Year") FROM table_19663 WHERE "Womens doubles" = 'Diana Koleva Emilia Dimitrova' AND "Mens singles" = 'Jeliazko Valkov'
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: Name the number of years for womens doubles being diana koleva emilia dimitrova and jeliazko valkov ### Input: CREATE TABLE table_19663 (
    "Year" real,
    "Mens singles" text,
    "Womens singles" text,
    "Mens doubles" text,
    "Womens doubles" text,
    "Mixed doubles" text
) ### Response: SELECT COUNT("Year") FROM table_19663 WHERE "Womens doubles" = 'Diana Koleva Emilia Dimitrova' AND "Mens singles" = 'Jeliazko Valkov'