ในรหัสไปรษณีย์ 94107 ไม่พบทั้งหมอกและฝนในวันใด
In zip code 94107, on which day neither Fog nor Rain was not observed?
df_weather = pd.DataFrame(columns=['date', 'EVENTS', 'zip_code'])
df_weather[(df_weather['zip_code'] == '94107') & (~df_weather['EVENTS'].isin(['Fog', 'Rain']))]['date']