code: public int getInvertedListId(String id) throws Exception {
  		int iid = getInternalId(id);
  		if (iid == -1) {
  			throw new Exception("Id does not exist!");
  		}
  
  		DatabaseEntry key = new DatabaseEntry();
  		IntegerBinding.intToEntry(iid, key);
  		DatabaseEntry data = new DatabaseEntry();
  		if ((iidToIvfpqDB.get(null, key, data, null) == OperationStatus.SUCCESS)) {
  			TupleInput input = TupleBinding.entryToInput(data);
  			int listId = input.readInt();
  			return listId;
  		} else {
  			throw new Exception("Id does not exist!");
  		}
  	}
docs: Returns the inverted list of the image with the given id.
  
  @param id
  @return
  @throws Exception