#List reviewers
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX dc: <http://purl.org/dc/elements/1.1/>
PREFIX foaf: <http://xmlns.com/foaf/0.1/>
PREFIX mo: <http://purl.org/ontology/mo/>
PREFIX rel: <http://purl.org/vocab/relationship/>
PREFIX rev: <http://purl.org/stuff/rev#>
SELECT DISTINCT ?name WHERE {

  ?rev a rev:Review;
    rev:reviewer ?person.

  ?person foaf:name ?name 
}
ORDER BY ?name