text: 242       2                       332                        314              token_usage_completion_tokens  flesch_reading_ease  flesch_kincaid_grade  \    0                             34                91.61                   3.8       1                             28                94.66                   2.7       2                             18                81.29                   3.7              ...  difficult_words  linsear_write_formula  gunning_fog  \    0  ...                2