Conversation so far:
what happened to mihail sadoveanu in the 1910's?
In 1910, he was also appointed head of the National Theater Iasi, a position which he filled until 1919.
what else was he appointed to?
He was a leading presence at Minerva newspaper, alongside Anghel and critic Dumitru Karnabatt.
what was his greatest accomplishment named in the article?
Mihail Sadoveanu became a professional writer in 1908-1909, after joining the Romanian Writers' Society.

Question: who did he work with?
Self-contained rewrite: who did Mihail Sadoveanu work with?