Task: Question Decomposition
Input (English): question: How many years after the death of Richard Grenville's father did he become Marshal of Calais?
Output (English): #1 return the  death of Richard Grenville 's father 
#2 return Richard Grenville become the  Marshal of Calais 
#3 return year of #1 
#4 return year of #2 
#5 return the  difference of #4 and  #3