user: Question: Who was the builder for Joffre
Columns: ['Name/Number', 'Builder', 'Type', 'Status', 'Notes']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Irish Mail', 'Hunslet', "0-4-0ST 'Alice' class", 'Operational', 'Ex. Dinorwic Slate Quarry, Wales']
SQL:

assistant: SELECT "Builder" FROM "Table" WHERE "Name/Number" = 'Joffre';