code: def load_reference(path_to_reference):
      """Load Reference reference relevant passages
      Args:path_to_reference (str): path to a file to load.
      Returns:qids_to_relevant_passageids (dict): dictionary mapping from query_id (int) to relevant passages (list of ints).
      """
      with open(path_to_reference, "r") as f:
          qids_to_relevant_passageids = load_reference_from_stream(f)
      return qids_to_relevant_passageids
  
file_path: FARM/farm/evaluation/msmarco_passage_official.py
imports: import sys
  import statistics
  from collections import Counter
label_desc: Use image node_id 2 for calling a global function with example usage: load_reference(path_to_reference) and returns: qids_to_relevant_passageids