user: Question: When did the person born on 3 May 1446 cease to be countess?
Columns: ['Name', 'Father', 'Birth', 'Marriage', 'Became Countess', 'Ceased to be Countess', 'Death', 'Spouse']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Margaret of Bavaria', 'Albert I, Duke of Bavaria ( Wittelsbach )', '1363', '12 April 1385', "21 March 1405 husband's accession", "10 September 1419 husband's death", '23 January 1423', 'John']
SQL:

assistant: SELECT "Ceased to be Countess" FROM "Table" WHERE "Birth" = '3 May 1446';