Jenny Gleason เป็นแชมป์ของ Northeast Delta Dental International เมื่อใด?ไม่จำเป็นต้องใช้โต๊ะทั้งหมด
When was Jenny Gleason the champion of the Northeast Delta Dental International?It is not neccessary to use all the tables.
 table_15315276_1:  (dates [ VARCHAR ] champion [ VARCHAR) ]
SELECT dates FROM table_15315276_1 WHERE champion = "Jenny Gleason"