Complex sentence: Such passages are difficult though not impossible to come by Witzel 1995 and 2001 some Indologists and other writers have noted that "there is no textual evidence in the early literary traditions unambiguously showing a trace of" an Indo-Aryan migration.
Split into simpler sentences: Such passages are difficult though not impossible to come by Witzel 1995 and 2001. However, some Indologists and other writers have noted that "there is no textual evidence in the early literary traditions unambiguously showing a trace of" an Indo-Aryan migration.