What is Round 2 when Round 4 is Double and Round 3 is Single?
CREATE TABLE table_name_56 (
    round_2 VARCHAR,
    round_4 VARCHAR,
    round_3 VARCHAR
)
SELECT round_2 FROM table_name_56 WHERE round_4 = "double" AND round_3 = "single"
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 Round 2 when Round 4 is Double and Round 3 is Single? ### Input: CREATE TABLE table_name_56 (
    round_2 VARCHAR,
    round_4 VARCHAR,
    round_3 VARCHAR
) ### Response: SELECT round_2 FROM table_name_56 WHERE round_4 = "double" AND round_3 = "single"