Original sentence: Each member of the quartet is a member of the Slamka family.Jack Slamka is the father of Michael and Mark, and Don is his nephew.They have competed in international competition 12 times, most recently in Montreal where they earned international gold medals.They were the 2003 Barbershop Harmony Society International Quartet Champion
Edited sentence: Nothing can compare with the Power of family.Remarkably, each member of this quartet comes from the Slamka family.They were the 2003 International Quartet Champion.They've competed in international competition 12 times, most recently in Montreal where they earned international gold medals.This group consists of a father, his two sons, and his nephew