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