Task: Question Understanding
Input (English): Passage: With a 93-82 win over the Chicago Bulls on April 13, 2005, the Wizards clinched a playoff spot for the first time since 1996-97. Long-suffering fans celebrated by buying over 16,000 playoff tickets in two and a half hours the day tickets went on sale. In game 3 of the 2005 NBA Playoffs against the Bulls, the Wizards won their first playoff game since 1988. Adding to the "long-overdue" feeling was the fact that game 3 was the first NBA playoff game to be held within Washington, D.C. city limits. In the Wizards game 5 victory in Chicago, Arenas hit a buzzer-beater to win the game and the Wizards took their first lead in a playoff series since 1986. In Game 6 at the MCI Center, Jared Jeffries picked up a loose ball and went in for an uncontested tie-breaking dunk with 32 seconds left, thus giving the Wizards a 94-91 win and the teams first playoff series win in 23 years. They were only the 12th team in NBA history to win a playoff series after being down 0-2.
Question: Previous to 2005, when was the previous time the Wizards had won a playoff series?
Output (English): date