sentence: Mountains is a sub-category of that.
sentences_before: The Rocky Mountains are a group of mountains in North America. More precisely, they are mountains that are in both the United States and Canada.
concept_name: mountain
headings: Wikipedia:Categories Putting pages into categories Choosing the correct category
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.