         Sentence 1: Who sold the Upper Rhine to  Burgundy?    tence 2: The mouths of the Rhine, in the  ounty of Holland, fell to the Burgundian  letherlands in the 15th century; Holland  remained contentious territory throughout the  [European wars of religion and the eventual  -ollapse of the Holy Roman Empire, when the  length of the Rhine fell to the First French  [Empire and its client states.    