Definition: Given a question, generate a paraphrase of that question wihout changing the meaning of it. Your answer should reword the given sentence, but not add information to it or remove information from it. The answer to your question should be the same as the answer to the original question.
Input: Question: what nba team won back to back in 1989 and 1990?

what team back-to-back nba championship in 1989?