Something that might happen while running in a marathon is fatigue
You would run in a marathon because you want to win.
The first thing you do when you run in a marathon is warm up.
Something that might happen as a consequence of running in a marathon is winning money
Something that might happen as a consequence of running in a marathon is a heart attack
Something you need to do before you run in a marathon is drink water.
One of the things you do when you run in a marathon is sweat.
The last thing you do when you run in a marathon is rest.
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