Complex sentence: The song reached number one on September 19,1987, and also charted on "Billboard" s R&B/Hip Hop Songs chart and the Adult Contemporary chart, peaking at number one and number two respectively.
Split into simpler sentences: The song reached number one on September 19,1987. It also charted on "Billboard" s R&B/Hip Hop Songs chart and the Adult Contemporary chart, peaking at number one and number two respectively.