Question: Which appointer of the Joseph Clay (Georgia) is also the  President of the William Carmichael (diplomat) ?
SPARQL query:
PREFIX prop: <http://dbpedia.org/property/>
PREFIX onto: <http://dbpedia.org/ontology/>
 SELECT DISTINCT ?uri WHERE { <http://dbpedia.org/resource/Joseph_Clay_(Georgia)> onto:appointer ?uri. <http://dbpedia.org/resource/William_Carmichael_(diplomat)> prop:president ?uri}