Simplify the following text for a Grade 11 native English-speaking person.
Original: The Union Internationale des Associations d'Alpinisme ( UIAA ) has defined a list of 82 `` official '' Alpine 4,000-metre ( 13,123 ft ) summits .
Simplified: The Union Internationale des Associations d'Alpinisme ( UIAA ) has defined a list of 82 `` official '' Alpine 4,000-meter ( 13,123 ft ) peaks .