user: Question: Name the fleet numbers for diagram of 186 and lot number of 30798
Columns: ['Lot No.', 'Diagram', 'Mark', 'Builder', 'Fleet numbers', 'Notes']
Types: ['real', 'real', 'text', 'text', 'text', 'text']
Sample row: [30170.0, 183.0, '1', 'Doncaster', '9200–9276', 'BR1 bogies']
SQL:

assistant: SELECT "Fleet numbers" FROM "Table" WHERE "Diagram" = 186.0 AND "Lot No." = 30798.0;