user: Question: What district is Mac Collins an incumbent in?
Columns: ['District', 'Incumbent', 'Party', 'First elected', 'Result', 'Candidates']
Types: ['text', 'text', 'text', 'real', 'text', 'text']
Sample row: ['Georgia 2', 'Sanford Bishop', 'Democratic', 1992.0, 'Re-elected', 'Sanford Bishop (D) 53.97% Darrel Ealum (R) 46.03%']
SQL:

assistant: SELECT "District" FROM "Table" WHERE "Incumbent" = 'Mac Collins';