user: Question: What is the Revenues of Ukyo-daiyu?
Columns: ['Name', 'Tenure', 'Courtesy title', 'Court Rank', 'revenues']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Iwaki Yoshitaka ( 佐竹義隆 ? )', '1623–1634', 'Shuri-daiyu', 'Lower 5th (従五位下)', '20,000 koku']
SQL:

assistant: SELECT "revenues" FROM "Table" WHERE "Courtesy title" = 'Ukyo-daiyu';