    Sentence 4: "Gordon stressed that his bill is a lesson~  Jeaméd bilt aind not’a reflection.on Admiral Gehman, 's  handling of the Columbia investigation.”    Sentencé 2: But Gordon emphasized that the legislation  +he-introduced: last week is.‘ a lesson-learned bill and.  “not a reflection: on Adiniral (--Harold -) Gehman: 's  haridling of the Columbia investigation    