    Sentence I: Platinum prices soared to 23-year highs  Jeatlier this year after President Bush ( news - web  ites ) proposed investing $1.2 billion for research on  lruel cell-powered vehicles .    [Sentence 2: Platinum prices soared to 23-year highs  Jeatlier this year after US. President George W. Bush  [proposed investing $ 12 billion for research on fuel  ell-powered vehicles .         