user: Question: How many election results are there from the 19th district?
Columns: ['District', 'Incumbent', 'Party', 'Elected', 'Status', '2007 Result']
Types: ['text', 'text', 'text', 'real', 'text', 'text']
Sample row: ['1st', 'Terry Kilgore', 'Republican', 1993.0, 'Reelected', 'Terry Kilgore (R) 72.3% Jerry Taylor (D) 27.6%']
SQL:

assistant: SELECT COUNT("2007 Result") FROM "Table" WHERE "District" = '19th';