Question: Chloé Graftiaux, was a Belgian sport climber, who fell to her death, at what age, on the 3773 m Aiguille Noire de Peuterey at the Mont Blanc massif,a mountain range in the Alps, located mostly in France and Italy, but also straddling Switzerland at its northeastern end?
Sentence (from "Mont Blanc massif"): It contains eleven major independent summits, each over 4000 m in height, and is named after Mont Blanc (4808 m ), the highest point in western Europe and European Union.
Relevant evidence: No