user: Question: What value for U.S. dance occurred in 1986 when the value of U.S. R&B was 9?
Columns: ['Year', 'Title', 'U.S.', 'U.S. R&B', 'U.S. dance']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1984.0, '" Pretty Mess "', '75', '15', '13']
SQL:

assistant: SELECT "U.S. dance" FROM "Table" WHERE "Year" = 1986.0 AND "U.S. R&B" = '9';