user: Question: What state had a title of Duke for the royal house of Ji?
Columns: ['State', 'Type', 'Name', 'Title', 'Royal house']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Cai', 'Sovereign', 'Li', 'Marquis', 'Ji']
SQL:

assistant: SELECT "State" FROM "Table" WHERE "Title" = 'Duke' AND "Royal house" = 'Ji';