    Sehtence” 1: The flight had -taken: off -just...as  American ‘Il’ was being: hijacked, and at '8:42" the  United 176 flight crew: completed their: report on a  suspicious. transmission “overtieard from, another  plane (which turned. out.to. have beén Flight 11) just.  after takeoff.    Sentence’-2: The. aircrew’ kriew that. there’. was  something’ suspicigus. ‘    