user: Question: what is the series sorted when the released is May 2012?
Columns: ['Series Sorted', 'Title', 'Doctor', 'Featuring', 'Released']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['6EB/A', 'The Elite', '5th', 'Tegan , Nyssa , Dalek', 'October 2011']
SQL:

assistant: SELECT "Series Sorted" FROM "Table" WHERE "Released" = 'May 2012';