user: Question: What are the fleet number for the 4-6-4T locomotive?
Columns: ['Type', 'Fleet numbers', 'Quantity made', 'Manufacturer', 'Date made']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['2-2-2', '1–4', '4', 'Bury, Curtis, and Kennedy', '1848']
SQL:

assistant: SELECT "Fleet numbers" FROM "Table" WHERE "Type" = '4-6-4T';