ROOT@0..91
  DOCUMENT@0..91
    PARAGRAPH@0..32
      TEXT@0..31 "Single-line equation  ..."
      NEWLINE@31..32 "\n"
    BLANK_LINE@32..33
      BLANK_LINE@32..33 "\n"
    PARAGRAPH@33..63
      DISPLAY_MATH@33..47
        DISPLAY_MATH_MARKER@33..35 "$$"
        TEXT@35..45 " E = mc^2 "
        DISPLAY_MATH_MARKER@45..47 "$$"
      WHITESPACE@47..48 " "
      ATTRIBUTE@48..62
        ATTRIBUTE@48..62 "{#eq-einstein}"
      NEWLINE@62..63 "\n"
    BLANK_LINE@63..64
      BLANK_LINE@63..64 "\n"
    PARAGRAPH@64..91
      TEXT@64..77 "Reference to "
      CITATION@77..89
        CITATION_MARKER@77..78 "@"
        CITATION_KEY@78..89 "eq-einstein"
      TEXT@89..90 "."
      NEWLINE@90..91 "\n"

