DOCUMENT@0..35
  HEADING@0..11
    ATX_HEADING_MARKER@0..1
      ATX_HEADING_MARKER@0..1 "#"
    WHITESPACE@1..2 " "
    HEADING_CONTENT@2..9
      TEXT@2..9 "Heading"
    NEWLINE@9..11 "\r\n"
  BLANK_LINE@11..13
    BLANK_LINE@11..13 "\r\n"
  PARAGRAPH@13..35
    TEXT@13..33 "This is a paragraph."
    NEWLINE@33..35 "\r\n"

