That is an example of a contribution, which was spread over several pages. This will place more in the HTML view of the editor nextpage inserted. Switch to HTML view and add to those posts, will come when a page break, the Next button one. Change every "Next" button, the word more in nextpage to. The site navigation is point out automatically inserted by WordPress.
This is page 1
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Duis aute irure dolor in reprehenderit esse velit cillum dolore eu in amet fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
