user: Question: What is the born-died that has office of 13 September 1229 as the entered?
Columns: ['Throne Name', 'Title', 'Born-Died', 'Entered office', 'Left office']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['s Great Khan (1221–1256)', 's Great Khan (1221–1256)', 's Great Khan (1221–1256)', 's Great Khan (1221–1256)', 's Great Khan (1221–1256)']
SQL:

assistant: SELECT "Born-Died" FROM "Table" WHERE "Entered office" = '13 September 1229';