user: Question: Who is the Shirt Back Sponsor if the Shorts Sponsor is Telestet?
Columns: ['Period', 'Manufacturer', 'Shirt main sponsor', 'Shirt back sponsor', 'Shorts sponsor', 'Sleeves sponsor']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['1976–82', 'Adidas', '—', '—', '—', '—']
SQL:

assistant: SELECT "Shirt back sponsor" FROM "Table" WHERE "Shorts sponsor" = 'Telestet';