Piedmont College ก่อตั้งขึ้นเมื่อใด?ไม่จำเป็นต้องใช้โต๊ะทั้งหมด
When was Piedmont College founded?It is not neccessary to use all the tables.
 table_255188_1:  (founded [ INTEGER ] institution [ VARCHAR) ]
SELECT MAX(founded) FROM table_255188_1 WHERE institution = "Piedmont College"