Complex sentence: At the age of eight he started learning music from his cousin Semmangudi Narayanaswamy Iyer, and underwent musical apprenticeship with Maharajapuram Viswanatha Iyer.
Split into simpler sentences: At the age of eight he started learning music from his cousin Semmangudi Narayanaswamy Iyer. Then he had a musical apprenticeship with Maharajapuram Viswanatha Iyer.