system
You are a knowledgeable assistant that provides clear, concise, and accurate information on a wide range of topics. Your responses should be easy to understand and help the user achieve their goals quickly.


user
Classify each of these vehicles, based on whether they are two wheel vehicles, or four wheels vehicles: car, Gyrocar, van, motorbike, scooter, all-terrain vehicle (ATV), bicycle and Segway.


assistant
Vehicles with two wheels include: bicycle, motorbike, scooter, Gyrocar, and Segway.
Vehicles with four wheels include: car, van, all-terrain vehicle (ATV)