on whether to grant Hungarian citizenship to Hungarians living outside Hungary's borders (i.e. without requiring a permanent residence in Hungary). The referendum failed due to insufficient voter turnout. On 26 May 2010, Hungary's Parliament passed a bill granting dual citizenship to ethnic Hungarians living outside of Hungary. Some neighboring countries with sizable Hungarian minorities expressed concerns over the legislation. Ethnic affiliations and genetic origins The Hungarian language belongs to the Uralic language family. Modern Hungarians are however genetically rather distant from their closest linguistic relatives (Mansi and Khanty), and more similar to the neighbouring non-Uralic neighbors. Modern Hungarians share a small but significant "Western Siberian" component with other Uralic-speaking populations maximized among modern Khanty. The historical Magyars had a higher "Western Siberian" component as well as strong links to the populations of the Baraba region, Inner Asia, Eastern Europe, Northern Europe and Central Asia. Modern Hungarians also display noteworthy affinity with historical Sintashta culture samples. Archeological mtDNA haplogroups show a similarity between Hungarians and Turkic-speaking Tatars and Bashkirs, while another study found a link between the Khanty and Bashkirs, suggesting that the Bashkirs are a mixture of Turkic, Ugric and Indo-European contributions. The homeland of ancient Hungarians is around the Ural Mountains, and the Hungarian affinities with the Karayakupovo culture is widely accepted among researchers. A full genome study by Triska et al. 2017 found that the Bashkirs "were strongly influenced by Ancient North Eurasians, highlighting a mismatch of their cultural background and genetic ancestry and an intricacy of the historic interface between Turkic and Uralic populations". The proto-Uralic peoples homeland may have been the Okunev culture, a forest culture in the Altai-Sayan region, characterized by high genetic affinity to the Botai culture in Northern Central Asia and the ancient Tarim mummies in modern day Xinjiang, as well as Western Siberian hunter-gatherers (WSHG). Their "eastern" genetic affinities may be explained by contact with proto-Turkic peoples. The arrival of the Indo-European Afanasievo culture may have caused the dispersal and expansion of proto-Uralic languages along the Seima-Turbino cultural area. According to Neparáczki: "From all recent and archaic populations tested the Volga Tatars show the smallest genetic distance to the entire Conqueror population" and "a direct genetic relation of the Conquerors to Onogur-Bulgar ancestors of these groups is very feasible." Genetic data found that among "Western Turkic speakers, like Chuvash and Volga Tatar, the East Asian component was detected only in low amounts