premise: I just completed my first marathon today.
initial: It was about six miles and I worked real hard.
counterfactual: I had not trained for it at all and still succeeded.
original_ending: I trained for it for about three months. It's always been on my to do list in life I've never been happier.
edited_ending: I could not train for it for about three months.It's always been on my to do list in life.I've never been happier.<SEP>Others had trained for it for about three months.It's always been on my to do list in lifeI've never been happier.<SEP>I trained for it for about three months in my mind, but not physically.It's always been on my to do list in lifeI've never been happier to have actually done it and with little work.