car_name	mpg	group
Mazda RX4	21	6
Mazda RX4 Wag	21	6
Datsun 710	22.8	6
Hornet 4 Drive	21.4	6
Hornet Sportabout	18.7	8
Valiant1	18.1	4
Mazda RX41	21	6
Mazda RX4 Wag1	21	2
Datsun 711	22.8	6
Hornet 4 Drive1	21.4	6
Hornet Sportabout1	18.7	8