Complex sentence: Michèle won her first singing contest at age 15, in in 1962, winning the first year's "On Chante dans mon Quartier" (They Sing in my Neighborhood) contest in Avignon.
Split into simpler sentences: Michèle won her first singing contest at age 15, in in 1962. Winning the first years "On Chante dans mon Quartier" (They Sing in my Neighborhood) contest in Avignon.