Task: Question Generation
Input (English): #1 return documents 
#2 return document type codes of  #1 
#3 return #1 where  #2 is  CV 
#4 return #1 where  #2 is  BK 
#5 return #3 or  #4 
#6 return number of #5
Output (English): How many documents have document type code CV or BK?