user: Question: What is the external weapon with a Ramhead Cart?
Columns: ['Knight', 'Weapon/item', 'External weapon', 'Shield animal', 'Cart']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Arthur', 'Excalibur', 'None', 'Dragon', 'Dahlia Cart']
SQL:

assistant: SELECT "External weapon" FROM "Table" WHERE "Cart" = 'Ramhead Cart';