Complex sentence: Around 400 BC, the "Prohorovo culture" spread towards the lands now forming Bashkortostan; although this culture is primarily attributed to the Sarmatians, groups of the ancient Magyars may have also been involved in this migration, according to Fodor.
Split into simpler sentences: Around 400 BC, the "Prohorovo culture" spread towards the lands now forming Bashkortostan. Although this culture is primarily attributed to the Sarmatians, Magyar groups may have also been involved in this migration, according to Fodor.