    Sentence 1: Platinum prices, soared to 23-year highs   cae this year after Presiglent Bush ( news - web sites  ) proposed investing $1.2 billion for research on fuel  |-powered vehicles .    Sentence 2: Platinami:'prices soared to 23-year highs  earlier this year aftér U.S. President George W. Bush  Proposed investing $ 12 bilin for research on fuel  cell-powered vehid                   