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PREFIX  foaf:   <http://xmlns.com/foaf/0.1/>
PREFIX    ex:   <http://example.org/things#>
SELECT ?name ?plan ?dept ?img 
WHERE 
{ 
    ?person foaf:name ?name  
    { ?person ex:healthplan ?plan } UNION { ?person ex:department ?dept } 
    OPTIONAL { 
        ?person a foaf:Person
        GRAPH ?g { 
            [] foaf:name ?name;
               foaf:depiction ?img 
        } 
    } 
}