ชื่อใดมีผู้ผลิตซีเมนส์และมีปริมาณ 52 ราย
Which Designation has a Manufacturer of siemens, and a Quantity of 52?
df = pd.DataFrame(columns=['designation', 'manufacturer', 'quantity'])
df.loc[(df['manufacturer'] == 'siemens') & (df['quantity'] == 52), 'designation']