instruction: Give me some tips on how to train for a marathon.
response: - Come up with a training plan
  - Plan for 3-5 months of training
  - Increase your daily mileage gradually
  - Increase your weekly mileage gradually
  - Have a mix of speedwork and endurance work
  - Include sessions to build strength
  - Stretch before and after your runs
  - Include rest days for recovery
  - Pay attention to nutrition and hydration
  - Pay attention to hydration
  - Taper 2 weeks before the marathon
  - Go for it, good luck on race day!