PREFIX p: <http://dbpedia.org/property/>
PREFIX dbpedia: <http://dbpedia.org/resource/>
PREFIX category: <http://dbpedia.org/resource/Category:>
PREFIX skos: <http://www.w3.org/2004/02/skos/core#>

SELECT DISTINCT ?p
WHERE {
?x ?p ?y.
?x p:location dbpedia:Paris.
?x skos:subject category:Software_companies.}