Conversation so far:
what is madhvacharya biography?
The biography of Madhvacharya is unclear.
Many sources date him to 1238-1317 period, but some place him about the 1199-1278 period.
was he married?
became a monk or Sannyasi in his teenage.

Question: what was his greatest accomplishment?
Self-contained rewrite: what was Madhvacharya greatest accomplishment?