When was the boston marathon?
When is the boston marathon this year?
When does the boston marathon start? Where is the boston marathon? Where was the boston marathon? How long is a marathon? How do I qualify for the boston marathon 2016? How do you qualify for the boston marathon? How do I qualify for the boston marathon? How long does it take to walk a marathon? How close are we to achieving the two hour marathon? When is the best time to run? What is a good time for a person running their first half marathon? Since when does everybody know what year it is? What does it feel like to be the last one in a marathon? What is it like running a marathon? When do you think a sub 2 hour marathon will be run? How is a sports stadium run? What does it feel like to run a marathon? How do I learn Marathon? What are you thinking about when you are running a marathon? How can I learn marathon? How can I learn marathons? What are the months in seasons for Chicago, Midwest? How do we know what year it is? When will the results of the 2016 U.S. Presidential elections be declared? What is the schedule for Paris  fall/winter 2013-14 fashion week? What are the most beautiful trail/off-road marathons in North America? When will the results of the 2012 U.S. Presidential elections be declared? When does basketball season start typically? Is the NHL going to the 2018 Olympics? I am training for a marathon. As I research I see so many discouraging articles telling me that marathon running is bad. Is it a good idea?