user: Question: What is the last year a sponsorship ended?
Columns: ['Sponsored name', 'Non-sponsored name', 'Sponsor', 'Stadium', 'City', 'Country', 'Sport', 'Sponsorship Ended']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text', 'real']
Sample row: ['Inter CableTel A.F.C.', 'Inter Cardiff F.C.', 'CableTel', 'Cyncoed Campus', 'Cardiff', 'Wales', 'Association football', 1999.0]
SQL:

assistant: SELECT MAX("Sponsorship Ended") FROM "Table";