Complex sentence: In the summer of 2000, Horford and his family moved to Lansing, Michigan, where he attended Grand Ledge High School in Grand Ledge, Michigan, and was a star player on its basketball team.
Split into simpler sentences: In the Summer of 2000, Horford and his family moved to Lansing, Michigan. Where he attended Grand Ledge High School in Grand Ledge, Michigan, and was a star player on its basketball team.