Question: Whom did Nikolai Durkin say lived in a village on the Kheuveren River?
Sentence: This hypothesis is based on the testimony of Chukchi geographer Nikolai Daurkin, who had visited Alaska in 1764–1765 and who had reported on a village on the Kheuveren River, populated by "bearded men" who "pray to the icons".
Answer in sentence: yes