a marathon called the Boston marathon
A twenty-mile Marathon.
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I plan to compete in next month's marathon.
You will be participating in the January marathon.
a long distance race of 42.195 kilometres, called a marathon
I'm worried whether I can run a marathon.
The marathon race will be carried out even in the wet.
I intend on participating in a full marathon.
I am training in order to participate in the marathon.
I thought about challenging myself to a marathon.
I intend to run a half marathon next year.
I'd like to run slowly and enjoy the next marathon.
I'd like to run slowly and enjoy the next marathon.
Lots of people took part in the marathon.
I have run a marathon 3 times before.