abstract Demo =  
  Noun- [AdvCN],
--  Verb,
  Clause, -- 
  Adjective,
  Adverb,
  Numeral,
----  Sentence, 
----  Question,
----  Relative,
----  Conjunction,
----  Phrase,
----  Text,
----  Idiom,
  Structural,
  Lexicon ;