user: Question: What fleet  numbers have a diagram less than 99 and built in 1960?
Columns: ['Lot No.', 'Diagram', 'Built', 'Builder', 'Fleet numbers']
Types: ['real', 'real', 'text', 'text', 'text']
Sample row: [30485.0, 97.0, '1957–1958', 'York', '1801–1812']
SQL:

assistant: SELECT "Fleet numbers" FROM "Table" WHERE "Diagram" < 99.0 AND "Built" = '1960';