The conversation between human and AI assistant.
[|Human|] Classify each as being used on water or land: jet ski, boat, car, bike, kayak, skateboard
[|AI|] Jet Ski: Water
Boat: Water
Car: Land
Bike: Land
Kayak: Water
Skateboard: Land
[|Human|] 
Classify each as being used on water or land: jet ski, boat, car, bike, kayak, skateboard