user: Question: Which party's 1st member is John Ivatt Briscoe in an election in 1857?
Columns: ['Election', '1st Member', '1st Party', '2nd Member', '2nd Party']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['1832', 'William Denison', 'Whig', 'John Leach', 'Whig']
SQL:

assistant: SELECT "1st Party" FROM "Table" WHERE "1st Member" = 'John Ivatt Briscoe' AND "Election" = '1857';