code: def check_decade_apostrophes_short(text):
      
      err = "dates_times.dates"
      msg = u"Apostrophes aren't needed for decades."
  
      regex = "\d0\'s"
  
      return existence_check(
          text, [regex], err, msg, excluded_topics=["50 Cent"])
docs: Check the text for dates of the form X0's.