Database: bike_share_1
Question: List out all stations name that having a mean temperature 20 degree Celsius in year 2014.
SQL: SELECT DISTINCT T2.start_station_name, T2.end_station_name FROM weather AS T1 INNER JOIN trip AS T2 ON T1.zip_code = T2.zip_code WHERE T1.date LIKE '%2014' AND T1.mean_temperature_f = 20 * 1.8 + 32