user: Question: who is the opponent when the streak is Won 9 on April 13, 1990?
Columns: ['Date', 'Opponent', 'Score', 'Record', 'Streak']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['November 3, 1989', 'Cleveland Cavaliers', '124–119 (OT)', '1–0', 'Won 1']
SQL:

assistant: SELECT "Opponent" FROM "Table" WHERE "Streak" = 'Won 9' AND "Date" = 'April 13, 1990';