From GSMN to RDF and back

For each uniprot entry of the mouse proteome find the catalyzed rhea reactions. Given those reactions retrieve the ChEBI that are involved in those reactions.

PREFIX up:<http://purl.uniprot.org/core/> 
PREFIX taxon:<http://purl.uniprot.org/taxonomy/> 
PREFIX rdf:<http://www.w3.org/1999/02/22-rdf-syntax-ns#> 
PREFIX rdfs:<http://www.w3.org/2000/01/rdf-schema#>
PREFIX rh:<http://rdf.rhea-db.org/>
SELECT 
  ?protein 
  ?rhea
  ?rheaEquation
WHERE
{
  ?protein up:organism taxon:10090 ;
           up:reviewed true ;
           up:annotation/up:catalyticActivity/up:catalyzedReaction ?rhea .
  SERVICE <https://sparql.rhea-db.org/sparql> {
  	?rhea ?x ?rheaEquation .  
  }
}