user: Question: How many have SHT number 5?
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 COUNT("Quantity") FROM "Table" WHERE "SHT Nos." = '5';