user: Question: Name the number of party for Richard L. Hanna (R) 53.1% Mike Arcuri (D) 46.9%
Columns: ['District', 'Incumbent', 'Party', 'First elected', 'Result', 'Candidates']
Types: ['text', 'text', 'text', 'real', 'text', 'text']
Sample row: ['New York 1', 'Tim Bishop', 'Democratic', 2002.0, 'Re-elected', 'Tim Bishop (D) 50.2% Randy Altschuler (R) 49.8%']
SQL:

assistant: SELECT COUNT("Party") FROM "Table" WHERE "Candidates" = 'Richard L. Hanna (R) 53.1% Mike Arcuri (D) 46.9%';