Question: Janina Vilayet was a division created by merging a subdivision of the Ottoman Empire known as what?
Sentence (from "Sivas Vilayet"): The Vilayet of Sivas (Ottoman Turkish: ولايت سيوس, Vilâyet-i Sivas‎ ;) was a first-level administrative division (vilayet) of the Ottoman Empire, and was one of the Six Armenian vilayets.
Relevant evidence: No