code: def load_mentions_vocab(mentions, filter_stop_words=False):
      vocab = extract_vocab(mentions, filter_stop_words)
      logger.info("Done loading mentions files...")
      return vocab
  
file_path: nlp-architect/nlp_architect/models/cross_doc_coref/system/cdc_utils.py
imports: import logging
  import os
  from typing import List
  from nlp_architect.common.cdc.cluster import Clusters
  from nlp_architect.common.cdc.mention_data import MentionData
  from nlp_architect.common.cdc.topics import Topic
  from nlp_architect.utils.string_utils import StringUtils
label_desc: Use image node_id 4 for calling a global function with example usage: load_mentions_vocab(mentions, filter_stop_words) and returns: vocab