code: def process_mentions_for_candidate_generator(sentences, mentions):
      for m in mentions:
          m["context"] = sentences[m["sent_idx"]]
      return mentions
  
file_path: BLINK/blink/candidate_generation.py
imports: import re
  import os
  import pysolr
  import sys
  import blink.candidate_retrieval.utils
label_desc: Use image node_id 4 for calling the BM45_Candidate_Generator obj's underlying member method code with example usage: obj.process_mentions_for_candidate_generator(sentences, mentions) and returns: mentions