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                                                                                                                                                A
                                                                                                                                               word




                                                                                                                                           First
                                                                                                                                          letter
                                                                                                                                          capital                                         No



                                                                                                                                                                                                               Common words
                                                                                                                                                                                                                                                                                                                       No
                                                                                                                                                           Yes




                                                                                                                                    Beginning                                                                                                                                                               Somewhere
                                                                                                                                   of sentence                                                                                                                                                               else as
                                                                                                                                                                                               No                                                                       Yes                                proper noun



                                                                                                                                                                                                                 Proper nouns


                                                                                                                                                           Yes




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                                                                                                                                                                                                             Ambiguous words




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                                                                                                                   Stopwords
                                                                                                                                                                                             Diacritical mark
                                                                                                                                                                                                elimination


                                                                                       Proper
                                                                                       nouns


    Document 1

                                                                                                                                                                                                                 Porter
                                                                                                                                                                                                                stemming
                                                                                        Common
                                                                                        words                                                                                                                                                                                                                                                                                                                                  Vocabulary of
                                                                                                                                                                                                                                                                                                                                                                                                                               proper nouns
                                                                                                                       Stopwords


               ...
                                                                                                                      Stopwords
                                                                                                                                                                                              Diacritical mark
                                                                                                                                                                                                 elimination


                                                                                     Proper
                                                                                     nouns                                                                                                                                                                                                                                                                                                                                       Vocabulary of
                                                                                                                                                                                                                                                                                                                                                                                                                                 common words


  Document n

                                                                                                                                                                                                                 Porter
                                                                                                                                                                                                                stemming
                                                                                      Common
                                                                                      words



                                                                                                                                            :²58jJ9P7 ¶ ´¦Z²­›d=9f2?Ešdf58I<nIo¯dfJ7•3CIJEG2Ha;6XU2H9=587QM
                                                                                                                         Stopwords





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