Question: Which people have as their given name Jimmy?
SPARQL:
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX foaf: <http://xmlns.com/foaf/0.1/>
SELECT DISTINCT ?uri ?string
WHERE 
{
	?uri rdf:type foaf:Person.       
        ?uri foaf:givenName 'Jimmy'@en   .
        OPTIONAL {?uri rdfs:label ?string . FILTER (lang(?string) = 'en') }
}