Sure, here's a SPARQL query that retrieves all movies produced by Ridley Scott from the DBpedia endpoint:

PREFIX dbo: <http://dbpedia.org/ontology/>
PREFIX dct: <http://purl.org/dc/terms/>

SELECT DISTINCT ?movie WHERE {
  ?movie a dbo:Film ;
         dct:creator ?creator .
  ?creator rdfs:label "Ridley Scott"@en .
}

Please note that this query retrieves movies where Ridley Scott is listed as a creator, which could include roles other than producer. DBpedia does not have specific data for movie producers.

To encode this query into a clickable link, you can use the DBpedia SPARQL endpoint's URL like this:

https://dbpedia.org/sparql?default-graph-uri=http%3A%2F%2Fdbpedia.org&query=PREFIX+dbo%3A+%3Chttp%3A%2F%2Fdbpedia.org%2Fontology%2F%3E+PREFIX+dct%3A+%3Chttp%3A%2F%2Fpurl.org%2Fdc%2Fterms%2F%3E+SELECT+DISTINCT+%3Fmovie+WHERE+%7B+%3Fmovie+a+dbo%3AFilm+%3B+dct%3Acreator+%3Fcreator+.+%3Fcreator+rdfs%3Alabel+%22Ridley+Scott%22%40en+.+%7D&format=text%2Fhtml&timeout=0&debug=on

Here's the same link, but formatted for better readability:

DBpedia SPARQL Query for Ridley Scott's Movies