Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_2668401_17 (first_elected VARCHAR, result VARCHAR)
### Question:
When was the incumbent first elected in the district where the result was a democratic-republican gain? 
### Answer:
SELECT first_elected FROM table_2668401_17 WHERE result = "Democratic-Republican gain"