Complex sentence: All of the whiskey bottled under the Bushmills whiskey brand is produced at the Bushmills Distillery and uses water drawn from Saint Columb's Rill, which is a tributary of the River Bush.
Split into simpler sentences: All of the whiskey bottled under the Bushmills whiskey brand is produced at the Bushmills Distillery. It uses water drawn from Saint Columb's Rill which is a tributary of the River Bush.