Complex sentence: Philippe d'Encausse (born 24 March 1967 in Clermont-Ferrand) is a retired French pole vaulter, who's father, Herve d'Encausse, was a European record holder in pole vault.
Split into simpler sentences: Philippe d'Encausse (born 24 March 1967 in Clermont-Ferrand) is a retired French pole vaulter. His father, Herve d'Encausse, was a European record holder in pole vault.