sentence: Pages are put into categories by placing one or more 'Category tags' on the page.
sentences_after: Category tags are the wiki markup used by the Wikimedia software to put pages in categories.
concept_name: page
headings: Wikipedia:Categories Putting pages into categories
categories: Rivers in EnglandRiver Thames Wikipedia. If a space is used after the pipe character, the category will be sorted using that space. This will place the article at the top of list in the category. This should not be done with people articles.