Add an object with the array ["Nelson Mandela", 1994, 1999] as the key and the array ["Margaret Thatcher", 1979, 1990] as the value to an existing Politicians table.
Use the following functions in your solution: JSON_ARRAY(), JSON_OBJECT().
Your output should be as follows:
{"[Nelson Mandela, 1994, 1999]": ["Margaret Thatcher", 1979, 1990]}