user: Question: What track has a 250 cc of Sito Pons?
Columns: ['Year', 'Track', '250 cc', '500 cc', 'Report']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1990.0, 'Rijeka', 'Carlos Cardús', 'Wayne Rainey', 'Report']
SQL:

assistant: SELECT "Track" FROM "Table" WHERE "250 cc" = 'Sito Pons';