Complex sentence: Music critic Norman Lebrecht, who knew Boulez personally, speculated that he was gay, citing the fact that for many years he shared his home in Baden-Baden with Hans Messmer, whom he sometimes referred to as his valet.
Split into simpler sentences: Music critic Norman Lebrecht, who knew Boulez personally, speculated that he was gay. For many years he shared his home in Baden-Baden with Hans Messmer, whom he sometimes referred to as his valet.