'; This examples from WikiPedia ' Text
'<'           Punctuation
'https://en.wikipedia.org/wiki/Backus%E2%80%93Naur_Form' Name.Class
'>'           Punctuation
'.\n\n   '    Text
'<'           Punctuation
'postal-address' Name.Class
'>'           Punctuation
' '           Text
'::='         Operator
' '           Text
'<'           Punctuation
'name-part'   Name.Class
'>'           Punctuation
' '           Text
'<'           Punctuation
'street-address' Name.Class
'>'           Punctuation
' '           Text
'<'           Punctuation
'zip-part'    Name.Class
'>'           Punctuation
'\n\n        ' Text
'<'           Punctuation
'name-part'   Name.Class
'>'           Punctuation
' '           Text
'::='         Operator
' '           Text
'<'           Punctuation
'personal-part' Name.Class
'>'           Punctuation
' '           Text
'<'           Punctuation
'last-name'   Name.Class
'>'           Punctuation
' '           Text
'<'           Punctuation
'opt-suffix-part' Name.Class
'>'           Punctuation
' '           Text
'<'           Punctuation
'EOL'         Name.Class
'>'           Punctuation
'\n                      | ' Text
'<'           Punctuation
'personal-part' Name.Class
'>'           Punctuation
' '           Text
'<'           Punctuation
'name-part'   Name.Class
'>'           Punctuation
'\n\n    '    Text
'<'           Punctuation
'personal-part' Name.Class
'>'           Punctuation
' '           Text
'::='         Operator
' '           Text
'<'           Punctuation
'initial'     Name.Class
'>'           Punctuation
' "." | '     Text
'<'           Punctuation
'first-name'  Name.Class
'>'           Punctuation
'\n\n   '     Text
'<'           Punctuation
'street-address' Name.Class
'>'           Punctuation
' '           Text
'::='         Operator
' '           Text
'<'           Punctuation
'house-num'   Name.Class
'>'           Punctuation
' '           Text
'<'           Punctuation
'street-name' Name.Class
'>'           Punctuation
' '           Text
'<'           Punctuation
'opt-apt-num' Name.Class
'>'           Punctuation
' '           Text
'<'           Punctuation
'EOL'         Name.Class
'>'           Punctuation
'\n\n         ' Text
'<'           Punctuation
'zip-part'    Name.Class
'>'           Punctuation
' '           Text
'::='         Operator
' '           Text
'<'           Punctuation
'town-name'   Name.Class
'>'           Punctuation
' "," '       Text
'<'           Punctuation
'state-code'  Name.Class
'>'           Punctuation
' '           Text
'<'           Punctuation
'ZIP-code'    Name.Class
'>'           Punctuation
' '           Text
'<'           Punctuation
'EOL'         Name.Class
'>'           Punctuation
'\n\n  '      Text
'<'           Punctuation
'opt-suffix-part' Name.Class
'>'           Punctuation
' '           Text
'::='         Operator
' "Sr." | "Jr." | ' Text
'<'           Punctuation
'roman-numeral' Name.Class
'>'           Punctuation
' | ""\n      ' Text
'<'           Punctuation
'opt-apt-num' Name.Class
'>'           Punctuation
' '           Text
'::='         Operator
' '           Text
'<'           Punctuation
'apt-num'     Name.Class
'>'           Punctuation
' | ""\n'     Text
