Task: Question Decomposition
Input (English): question: What are the names and ids of documents that have the type code BK?
Output (English): #1 return documents 
#2 return type codes of  #1 
#3 return #1 where #2 is  BK 
#4 return names of  #3 
#5 return ids of  #3 
#6 return #4 ,  #5