What is listed as the average Date that has U-boats destroyed (KuK) of 2 with Tonnage of 1,514,050?
CREATE TABLE table_name_13 (
    date INTEGER,
    u_boats_destroyed__kuk_ VARCHAR,
    tonnage VARCHAR
)
SELECT AVG(date) FROM table_name_13 WHERE u_boats_destroyed__kuk_ = "2" AND tonnage = "1,514,050"
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 listed as the average Date that has U-boats destroyed (KuK) of 2 with Tonnage of 1,514,050? ### Input: CREATE TABLE table_name_13 (
    date INTEGER,
    u_boats_destroyed__kuk_ VARCHAR,
    tonnage VARCHAR
) ### Response: SELECT AVG(date) FROM table_name_13 WHERE u_boats_destroyed__kuk_ = "2" AND tonnage = "1,514,050"