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 team won back to back nba championships in 1989 and 1990?

what nba team won the back to back championship in 1989 and 1990?