Complex sentence: Historian Imre Boba refused the identification of Pribina's "Nitrava" with modern Nitra, because the modern names of the latter town (Slovak Nitra, Hungarian Nyitra and German Neutra) could not develop from the "Nitrava" form.
Split into simpler sentences: Historian Imre Boba refused the identification of Pribina's "Nitrava" with modern Nitra. For instance, he says that the modern names of the latter town (Slovak Nitra, Hungarian Nyitra and German Neutra) could not develop from the "Nitrava" form.