Consequently, known queries that refer to similar phrases may overlap significantly, or even become equal once the phrases have been replaced by a common slot filled by the phrases.
"kelley blue book value of 2008 dodge charger" and "kelley blue book value of 2008 honda civic" can be grouped into a shared query template "kelley blue book of 2008 ⋆", whose slot ⋆ is filled by the names of car models.