Definition: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
Input: (CNN) -- Miles Craigwell is a 21st-century warrior. The armor has come off, the helmet lays on the side of the field. Gone are his gridiron days -- this is rugby sevens and it's as fast as it is brutal. "We're modern-day gladiators," the 27-year-old told CNN's Rugby Sevens Worldwide show. "We are out there fighting, we are brotherhood, together, we're teammates. We hit each other for one another and we have each others' backs, so I think that sums it up very much." Craigwell knows all about being in a battle -- after an impressive college career at Brown University, he was tipped for big things when he was drafted by the Miami Dolphins.Miles Craigwell plays rugby sevens for the United StatesHe was drafted by NFL team Miami Dolphins after collegeCraigwell failed to make the grade and took up rugby insteadU.S. welcomes sevens circuit to Las Vegas in January 
 Question:Sevens is a non-stop sport, with games divided into seven-minute halves -- a world away from the stop-start nature of the _.

NFL