您可以使用完全相同的(唯一的)格式来查询所有书籍出版商，只是在类别、作者等方面有所不同。
You'd form a query about the publisher of any book in exactly the same (unique) form, just with different category, author, and so on.
其他类别包括书籍，电影，电视，足球和衣服。
Other categories included books, movies, TV, football and clothes.
书籍、作者、价格、类别都是各种信息。
Books, authors, prices, and categories are all forms of information.
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