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?
{'answer': '23', 'supporting_facts': [['Chloé Graftiaux', 0], ['Mont Blanc massif', 0]]}