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"

