Complex sentence: Leslie Moonves aka "Les" Moonves is the president and CEO of CBS Television and began dating Big Brother host Julie Chen during his long separation from his estranged wife Nancy Wiesenfeld Moonves.
Split into simpler sentences: Leslie Moonves aka "Les" Moonves is the president and CEO of CBS Television. He began dating Big Brother host Julie Chen during his long separation from his estranged wife Nancy Wiesenfeld Moonves.