Complex sentence: The Manhattans are a popular R&B vocal group with a string of hit records spanning four decades, their best-known million-selling songs being "Kiss and Say Goodbye" and "Shining Star" in 1976 and 1980, respectively.
Split into simpler sentences: The Manhattans are an American popular R&B vocal group, with a string of hit records spanning four decades. Their best known million-selling songs being "Kiss and Say Goodbye" and "Shining Star" in 1976 and 1980, respectively.