ความถี่แคทเธอรีน 8rn มีจุดประสงค์อะไร?ไม่จำเป็นต้องใช้ทุกตาราง
What is the purpose for the katherine freq of 8rn?It is not neccessary to use all the tables.
 table_name_50:  (purpose [ VARCHAR ] freq_currently [ VARCHAR ] area_served [ VARCHAR) ]
SELECT purpose FROM table_name_50 WHERE freq_currently = "8rn" AND area_served = "katherine"