Complex sentence: This area was known as the kingdom of Videha with capital at Mithila or Mithilanagar which has not been identified by archaeologists but folklore ascribes it to Janakpur in Nepal.
Split into simpler sentences: This area was known as the kingdom of Videha, with its capital at Mithila (or Mithilanagar). The site has not been identified by archaeologists; however, folklore ascribes it to Janakpur in Nepal.