user: Question: What is the royal house for Wu at the state of Cai?
Columns: ['State', 'Type', 'Name', 'Title', 'Royal house']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Cai', 'Sovereign', 'Wu', 'Marquis', 'Ji']
SQL:

assistant: SELECT "Royal house" FROM "Table" WHERE "Name" = 'Wu' AND "State" = 'Cai';