user: Question: Highest smaller than 3378, and a Stadium of Cappielow has what average capacity?
Columns: ['Team', 'Stadium', 'Capacity', 'Highest', 'Lowest', 'Average']
Types: ['text', 'text', 'real', 'real', 'real', 'real']
Sample row: ['Dundee', 'Dens Park', 11856.0, 6537.0, 2831.0, 3995.0]
SQL:

assistant: SELECT AVG("Capacity") FROM "Table" WHERE "Highest" < 3378.0 AND "Stadium" = 'Cappielow';