What are the biggest marathons?
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.
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request.
### Instruction: What are the biggest marathons?
### Input: 
### Response: 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.