user: Question: How many candidates ran in the election where Wayne Gilchrest was the incumbent?
Columns: ['District', 'Incumbent', 'Party', 'First elected', 'Results', 'Candidates']
Types: ['text', 'text', 'text', 'real', 'text', 'text']
Sample row: ['Maryland 1', 'Wayne Gilchrest', 'Republican', 1990.0, 'Re-elected', 'Wayne Gilchrest (R) 64% Bennett Bozman (D) 36%']
SQL:

assistant: SELECT COUNT("Candidates") FROM "Table" WHERE "Incumbent" = 'Wayne Gilchrest';