Complex sentence: After Carlos learned the art from Maeda, he passed his knowledge to his brothers Oswaldo, Gastão Jr., and George, meanwhile Hélio Gracie would peek in and practice the techniques, although he was told he was too young to practice.
Split into simpler sentences: After Carlos learned the art from Maeda, he passed his knowledge to his brothers Oswaldo, Gastão Jr., and George. Meanwhile, Hélio Gracie would peek in and practice the techniques, although he was told he was too young to practice.