text: 10                            138               109.04                   1.3       11                            138                83.66                   4.8               ...  difficult_words  linsear_write_formula  gunning_fog  \    0   ...                0                    5.5         5.20       1   ...                2                    6.5         8.28       2   ...                0                    5.5         5.20       3   ...                2