Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_15315276_1 (dates VARCHAR, champion VARCHAR)

### Question ###
When was Jenny Gleason the champion of the Northeast Delta Dental International?

### Accurate SQL ###

SELECT dates FROM table_15315276_1 WHERE champion = "Jenny Gleason"