#title.subheading  a general or descriptive heading for a section of a written work; "the novel had chapter titles"
  supertype:  subheading__subhead  a heading of a subdivision of a text
  subtype:  credit.title  an entry on a list of persons who contributed to a film or written work
  subtype:  caption__legend  brief description accompanying an illustration
  subtype:  subhead__subtitle  secondary or explanatory title

No statement uses or specializes title.subheading; click here to add one.