Complex sentence: Gault et Millau is one of the most influential French restaurant guides founded by two restaurant critics, Henri Gault (1929--2000) and Christian Millau in 1965.
Split into simpler sentences: Gault et Millau is one of the most influential French restaurant guides. It was founded by two restaurant critics, Henri Gault (1929--2000) and Christian Millau in 1965.