Task: Question Decomposition
Input (English): question: How many years was the time span that at least 400,000 people and maybe as many as 620,000 had died in Ireland?
Output (English): #1 return the  time span that at least 400,000 people and  maybe as many  as  620,000 had died in  Ireland 
#2 return years of #1 
#3 return number of  #2