    Sentence 1: Gordou stressed that his bill "is  a lesson-learned bill and not a reflection on   dmiral. Gehman 's haniling of the  Columbia investigation .."    Sentence. 2: ButGordon. emphasized that   the legislation hé introduced-last wéek is "a  lesson-learned bill and nial q reflection on  Admiral ( Harold ) Gehinan.' handling of  the: Columbia investigiition ."