sentences: to a human, a space frequency of carbohydrates age or more age is considered very long
docs: forever is long_time. age is time_of_life. adverb_of_frequency is adverb. gestation_period_for_humans is 9_months_from_conception. shelf_life is time_period. earth is billions_of_years_old. frequency is rate. long_time is time_period. space_age is time. human_life_expectancy is longer_than_feline_life_expectancy.