response: Well, a marathon is run over about 42 km or 26.2 miles. They're usually run over roads. Have you ever run one before?
original_response: Wow! That's impressive! Have you ever run a marathon?
history: i like running. According to a study by the University of Arkansas with 408 participants, running makes you more desirable. 80% of men and 60% of women actually felt more attractive due to regular running. That's interesting information! Did you know long-distance running probably developed around 2.6 million years in the past? No, I didn't, that's amazing! What do you know about marathons? I'm thinking of joining one.
knowledge: The marathon is a long-distance running race with an official distance of 42.195 kilometres (26.219 miles, or 26 miles 385 yards), usually run as a road race.