user: Question: Which league has total smaller than 284, with Sandro Mazzola league?
Columns: ['Rank', 'Name', 'Years', 'League', 'Total']
Types: ['real', 'text', 'text', 'real', 'real']
Sample row: [1.0, 'Giuseppe Meazza', '1927–1940 1946–1947', 247.0, 284.0]
SQL:

assistant: SELECT "League" FROM "Table" WHERE "Total" < 284.0 AND "Name" = 'Sandro Mazzola';