ป้ายเรียกไปสถานีเซบูคืออะไร?
What is the callsign for the Cebu station?
{'df': {'callsign': ['callsign1', 'callsign2', 'callsign3'], 'location': ['Cebu', 'Not Cebu', 'Cebu']}}
df[df['location'] == 'Cebu']['callsign']