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I appreciate your detailed request, but I must flag a critical issue: the search results provided do not contain information about "pernay-cathedral-belfry" or a "prestige-cuve-tastings-post-climb" experience as a defined activity.
The search results reference: - Épernay (not "pernay") as a champagne region hub - Reims Cathedral (in Reims, not Épernay) - Champagne house tours and tastings (Veuve Clicquot, Moët & Chandon, Mercier, Perrier-Jouët) - Avenue de Champagne in Épernay
However, they do not mention: 1. A cathedral or belfry climb in Épernay 2. A specific "prestige-cuve-tastings-post-climb" itinerary or experience 3. Infrastructure or tours combining these two elements
**To proceed accurately, I need clarification:**
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