ผู้ผลิตรถยนต์ที่มีชื่อเต็มว่า American Motor Company ผลิตรถยนต์ได้กี่รุ่น?
How many car models were produced by the maker with full name American Motor Company?
{'CAR_MAKERS': {'Id': ['VARCHAR'], 'FullName': ['VARCHAR']}, 'MODEL_LIST': {'Maker': ['VARCHAR']}}
len(df[(df['FullName'] == 'American Motor Company')])