ICAO ใดมีจังหวัดเฮย์หลงเจียง และ IATA ของ jmu
Which  ICAO has a Province of heilongjiang, and a IATA of jmu?
df = pd.DataFrame(columns=['icao', 'province', 'iata'])
df[(df['province'] == "heilongjiang") & (df['iata'] == "jmu")]['icao']