user: Question:  how many party with candidates being John M. Vorys (R) 61.5% Jacob F. Myers (D) 38.5%
Columns: ['District', 'Incumbent', 'Party', 'First elected', 'Result', 'Candidates']
Types: ['text', 'text', 'text', 'real', 'text', 'text']
Sample row: ['Ohio 2', 'William E. Hess', 'Republican', 1950.0, 'Re-elected', 'William E. Hess (R) 58.4% Earl T. Wagner (D) 41.6%']
SQL:

assistant: SELECT COUNT("Party") FROM "Table" WHERE "Candidates" = 'John M. Vorys (R) 61.5% Jacob F. Myers (D) 38.5%';