Does data represent things besides entities, attributes, and relationships?

On August 28, 2009 Michael Kay wrote:

> Data represents entities, attributes, and relationships.
 
Can every piece of data be categorized as a representation of an entity, attribute, or relationship?

For example, here's a description of a book:

    In this groundbreaking book, evolutionary
    biologist Jared Diamond stunningly dismantles
    racially biased theories of human history by
    revealing the environmental factors actually
    responsible for history's broadcast patterns.

It is data. 

It doesn't seem to be a representation of either an entity, attribute, or relationship.

Does data represent things besides entities, attributes, and relationships?

/Roger