What district first elected a Democratic incumbent in 1998?
CREATE TABLE table_1805191_50 (
    district VARCHAR,
    party VARCHAR,
    first_elected VARCHAR
)
SELECT district FROM table_1805191_50 WHERE party = "Democratic" AND first_elected = 1998
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 district first elected a Democratic incumbent in 1998? ### Input: CREATE TABLE table_1805191_50 (
    district VARCHAR,
    party VARCHAR,
    first_elected VARCHAR
) ### Response: SELECT district FROM table_1805191_50 WHERE party = "Democratic" AND first_elected = 1998