Level 'a' ended with "Now the same text can be used with each location. All you have to do it copy it everywhere.", but copying it everywhere can be tedious, and if you ever improve on the text you have to re-copy the improvements into each usage.

The alternative is to use (without the space after the first bracket)
    { copy_article id=N } or
    { insert_article id=N }

copy_article replaces the entire content of the current article with the pre-expansion content of another article, and then expands it.

insert_article replaces just the insert_articles reference with the pre-expansion content of another articles, and then expands both it and whatever other content may exist.

So if the Fremonyt hypnotherapy description were article 4, the entire contents of the Newark article might be
  { copy_article id=4}

Get the id numbers by editing the article and looking for it in the URL.
   edit_article&id=109