How to convert to string search in sparql?

@darion 

In SPARQL, you can convert a search query to a string using the STR function. The STR function converts the input value to a string.

For example, let's say you have a search query that retrieves all resources with a specific label:

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SELECT ?resource
WHERE {
  ?resource rdfs:label "example label" .
}

You can convert the label to a string using the STR function like this:

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SELECT ?resource
WHERE {
  ?resource rdfs:label ?label .
  FILTER(STR(?label) = "example label")
}

In this example, the STR(?label) function is used to convert the value of the ?label variable to a string, which allows you to compare it with the string "example label" using the FILTER clause.