user: Question: In how many different parts was the incumbent Abraham B. Venable?
Columns: ['District', 'Incumbent', 'Party', 'First elected', 'Result', 'Candidates']
Types: ['text', 'text', 'text', 'real', 'text', 'text']
Sample row: ['Virginia 1', 'Robert Rutherford', 'Democratic-Republican', 1793.0, 'Lost re-election Federalist gain', 'Daniel Morgan (F) Robert Rutherford (DR)']
SQL:

assistant: SELECT COUNT("Party") FROM "Table" WHERE "Incumbent" = 'Abraham B. Venable';