Complex sentence: On the night of the Academy Awards, Ashman told Menken that they needed to have an important talk when they got back to New York, where he revealed to Menken that he was HIV positive.
Split into simpler sentences: On the night of the Academy Awards, Ashman told Menken that they needed to have an important talk when they got back to New York. When they got back, he revealed to Menken that he was HIV positive.