Complex sentence: At the age of 72 (468 B.C), Lord Mahavira died and his purified soul left the body and achieved complete liberation i.e., attained Nirvana or Moksha.
Split into simpler sentences: At the age of 72 (468 B.C), Lord Mahavira died. His followers believe his purified soul left the body and achieved complete liberation i.e., attained Nirvana or Moksha.