user: Question: What is the district with the incumbent John Nicholas?
Columns: ['District', 'Incumbent', 'Party', 'First elected', 'Result', 'Candidates']
Types: ['text', 'text', 'text', 'real', 'text', 'text']
Sample row: ['Virginia 1', 'Daniel Morgan', 'Federalist', 1797.0, 'Retired Federalist hold', 'Robert Page (F) 54.3% John Smith (DR) 45.7%']
SQL:

assistant: SELECT "District" FROM "Table" WHERE "Incumbent" = 'John Nicholas';