What is the {practiced by} and the {studies} of {Economics} ?
What do you call a person who specializes in Economics?
Who practices and researches Economics?
SELECT ?b ?h WHERE { resource:economics property:practiced_by ?b . resource:economics property:studies ?h }
 SELECT ?ans_1 ?ans_2 WHERE { ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q8134> . ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P3095> . ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?ans_1. ?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q8134> . ?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P2578> . ?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?ans_2. } 
SELECT ?ans_1 ?ans_2 WHERE { wd:Q8134 wdt:P3095 ?ans_1 . wd:Q8134 wdt:P2578 ?ans_2 }
goods economist economy economist service economist goods Doctor of Economics economy Doctor of Economics service Doctor of Economics goods Doctor of Economics economy Doctor of Economics service Doctor of Economics goods Candidate of Economic Sciences economy Candidate of Economic Sciences service Candidate of Economic Sciences goods Professor of Economics economy Professor of Economics service Professor of Economics