ผู้ผลิตรายใดมีจำนวน 1 และมีชื่อ LMMR ว่า Great Mountain
Which Manufacturer has a Quantity of 1, and has the LMMR name Great Mountain?
df = pd.DataFrame(columns=['manufacturer', 'quantity', 'lmmr_name'])
df[(df['quantity'].astype(int) == 1) & (df['lmmr_name'] == 'great mountain')]['manufacturer']