code: def get_dates():
      """Return a list of all the epithet labels."""
      _dict = get_date_author()
      return sorted(_dict.keys())
  
imports: import json
  import os
  import regex
  from cltk.corpora.grc.tlg.author_date import AUTHOR_DATE
  from cltk.corpora.grc.tlg.author_epithet import AUTHOR_EPITHET
  from cltk.corpora.grc.tlg.author_female import AUTHOR_FEMALE
  from cltk.corpora.grc.tlg.author_geo import AUTHOR_GEO
  from cltk.corpora.grc.tlg.id_author import ID_AUTHOR
  from cltk.corpora.grc.tlg.index_lists import INDEX_LIST
  from cltk.corpora.grc.tlg.work_numbers import WORK_NUMBERS
label_desc: Use image node_id 17 for calling a global function with example usage: get_dates() and returns: sorted