user: Question: What is the total number of First Elected, when Party is "democratic", and when District is "tennessee 5"?
Columns: ['District', 'Incumbent', 'Party', 'First elected', 'Results']
Types: ['text', 'text', 'text', 'real', 'text']
Sample row: ['Tennessee 1', 'William L. Jenkins', 'Republican', 1996.0, 'Retired Republican hold']
SQL:

assistant: SELECT COUNT("First elected") FROM "Table" WHERE "Party" = 'democratic' AND "District" = 'tennessee 5';