user: Question: What is the average opening at stadyum samsun with a capacity smaller than 34658?
Columns: ['Stadium', 'Capacity', 'City', 'Club', 'Opening']
Types: ['text', 'real', 'text', 'text', 'real']
Sample row: ['Timsah Arena', 43877.0, 'Bursa', 'Bursaspor', 2014.0]
SQL:

assistant: SELECT AVG("Opening") FROM "Table" WHERE "Stadium" = 'stadyum samsun' AND "Capacity" < 34658.0;