user: Question: How many elections have resulted in Retired Democratic hold?
Columns: ['District', 'Incumbent', 'Party', 'First elected', 'Results', 'Candidates']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['New York 1', 'Michael Forbes', 'Republican', '1994', 'Re-elected', 'Michael Forbes (R) 64% William Holst (D) 36%']
SQL:

assistant: SELECT COUNT("Party") FROM "Table" WHERE "Results" = 'Retired Democratic hold';