Complex sentence: Nithsdale ("Srath Nid" in Scottish Gaelic), also known by its anglicised gaelic name Strathnith or Stranit, is the valley of the River Nith, which flows north to south through south-west Scotland.
Split into simpler sentences: Nithsdale ("Srath Nid" in Scottish Gaelic), also known by its anglicised gaelic name Strathnith or Stranit. Nithsdale is the valley of the River Nith, which flows north to south through south-west Scotland.