preferred_name: Half of daily AQI values were less than or equal to the median value, and half equaled or exceeded it
preferred_name_lc: half of daily aqi values were less than or equal to the median value, and half equaled or exceeded it
label: Half of daily AQI values were less than or equal to the median value, and half equaled or exceeded it
label_lc: half of daily aqi values were less than or equal to the median value, and half equaled or exceeded it