Which was the district that had first elected greater than 2006 and is democratic?
CREATE TABLE table_name_51 (
    district VARCHAR,
    party VARCHAR,
    first_elected VARCHAR
)
SELECT district FROM table_name_51 WHERE party = "democratic" AND first_elected > 2006
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: Which was the district that had first elected greater than 2006 and is democratic? ### Input: CREATE TABLE table_name_51 (
    district VARCHAR,
    party VARCHAR,
    first_elected VARCHAR
) ### Response: SELECT district FROM table_name_51 WHERE party = "democratic" AND first_elected > 2006