Complex sentence: Andelman is involved with many charitable organizations, but is best known in the New England area for his Hot Dog Safari, which he has hosted since 1990, raises money for the Joey Fund/Cystic Fibrosis (CF) Foundation.
Split into simpler sentences: Andelman is involved with many charitable organizations, but is best known in the New England area for hosting Eddie Andelman's Hot Dog Safari. The event which he has hosted for the past 18 years raises money for the Joey Fund/Cystic Fibrosis (CF) Foundation.