sentence: Categories are pages that are used to group other pages on similar subjects together.
sentences_after: This is done to help users find the  pages they are looking for, even if they do not know whether it exists or what it is called.
concept_name: category
headings: Wikipedia: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.