Complex sentence: Hubert Horatio "Buck" Humphrey IV is the son of former Minnesota attorney general Hubert H. Humphrey III and Nancy Lee Humphrey and the grandson of former US Vice President Hubert H. Humphrey and former Second Lady and US Senator Muriel Humphrey.
Split into simpler sentences: Hubert Horatio "Buck" Humphrey IV is the son of former Minnesota attorney general Hubert H. Humphrey III and Nancy Lee Humphrey. He is also the grandson of former US Vice President Hubert H. Humphrey and former Second Lady and US Senator Muriel Humphrey.