Who was the incumbent in the district that first elected someone in 1807?
CREATE TABLE table_2668378_18 (incumbent VARCHAR, first_elected VARCHAR)
SELECT incumbent FROM table_2668378_18 WHERE first_elected = "1807"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_2668378_18 (incumbent VARCHAR, first_elected VARCHAR) Question: Who was the incumbent in the district that first elected someone in 1807? [/INST] SELECT incumbent FROM table_2668378_18 WHERE first_elected = "1807" </s>