#1 return grants 
#2 return documents of  #1 
#3 return number of #2 for each #1 
#4 return #1 where  #3 is  highest 
#5 return grant id of  #4 
#6 return documents of  #4 
#7 return number of #6 
#8 return #5 ,   #7
How many documents can one grant have at most? List the grant id and number.