sentences: "David Reich, in his 2018 publication "Who We Are and How We Got Here", noting the presence of some Indo-European languages (such as Hittite) in parts of ancient Anatolia, states that "the most likely location of the population that first spoke an Indo-European language was south of the Caucasus Mountains, perhaps in present-day Iran or Armenia, because ancient DNA from people who lived there matches what we would expect for a source population both for the Yamnaya and for ancient Anatolians."