In this task, given a sentence in the English language, your task is to convert it into English Tokens.

[Q]: Also, "There continue to be reports of WMD in Iraq."
[A]: Also , '' There continue to be reports of WMD in Iraq . ''

[Q]: William Melek, an assistant professor of mechanical engineering at Ontario's University of Waterloo, has noted that to set up the AI needed for subsequent experiments involving new biological variables and criteria, the human expertise would be time consuming to customize it.
[A]: William Melek , an assistant professor of mechanical engineering at Ontario 's University of Waterloo , has noted that to set up the AI needed for subsequent experiments involving new biological variables and criteria , the human expertise would be time consuming to customize it .

[Q]: City officials in seven United States cities were warned today about a possible attack on NFL stadiums using "dirty bombs."
[A]:
City officials in seven United States cities were warned today about a possible attack on NFL stadiums using '' dirty bombs . ''