Complex sentence: Groza was born in Martins Ferry, Ohio the son of immigrant parents (his father was Romanian, his mother Hungarian), he was the smallest (at 6' 3) of three brothers in a decidedly athletic family.
Split into simpler sentences: Groza was born in Martins Ferry, Ohio, the son of immigrant parents (his father was Romanian, his mother Hungarian). He was the smallest (at 6' 3) of three brothers in a decidedly athletic family.