#stroke.mark  a mark made by a writing implement (as in cursive writing)
  supertype:  #mark  a visible indication made on a surface; "some previous reader had covered the pages with dozens of marks"
  subtype:  #downstroke  a stroke normally made in a downward direction
  subtype:  #upstroke  a stroke normally made in an upward direction
  subtype:  #underscore__underline  a line drawn underneath (especially under written matter)

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