user: Question: What GWR is associated with 4?
Columns: ['Manufacturer', 'Type', 'Quantity', 'SHT Nos.', 'GWR Nos.']
Types: ['text', 'text', 'real', 'text', 'text']
Sample row: ['Hudswell Clarke', '0-4-0ST', 1.0, '3', '150']
SQL:

assistant: SELECT "GWR Nos." FROM "Table" WHERE "Quantity" = 4.0;