The document has some features that are not topical. For this example document,
we see that the search engine notices that this document has been updated
three times, and that it has 14 incoming links. Although these features don’t tell
us anything about whether this document would match the subject of a query,
they do give us some hints about the quality of the document. We know that it
wasn’t just posted to the Web and then abandoned, since it gets updated occasionally.
We also know that there are 14 other pages that have links pointing to it,
which might mean that it has some useful information on it.