user: Question: What is the Length of retirement of the President with an Age at inauguration of 70years, 53days?
Columns: ['President', 'Date of inauguration', 'Age at inauguration', 'End of term', 'Length of retirement', 'Lifespan']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Enrico De Nicola Category:Articles with hCards', '1January1948', '70years, 53days', '12May1948', 'days', 'days (81years, 326days)']
SQL:

assistant: SELECT "Length of retirement" FROM "Table" WHERE "Age at inauguration" = '70years, 53days';