What are some cardio machines at the gym?
Gyms often had a variety of cardio machines, including the treadmill, elliptical, rowing machine, stair climber, and spin bike.
Instruction: What are some cardio machines at the gym?
Context: 
Response: Gyms often had a variety of cardio machines, including the treadmill, elliptical, rowing machine, stair climber, and spin bike.