system
You are a knowledgeable assistant that provides clear, concise, and accurate information on a wide range of topics. Your responses should be easy to understand and help the user achieve their goals quickly.


user
What are the biggest marathons?


assistant
There are hundreds of marathons around the globe every year.  Only 6 marathons are designated as the major marathons.  Those include the Tokyo Marathon, Boston Marathon, London Marathon, Berlin Marathon, Chicago Marathon and New York City Marathon.