What is the {profession} for {practiced by} of {algebra}
What profession practices algebra?
 select distinct ?obj where { wd:Q3968 wdt:P3095 ?obj . ?obj wdt:P31 wd:Q28640 } 
select distinct ?obj where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q3968> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P3095> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj . ?obj <http://www.wikidata.org/entity/P31> <http://wikidata.dbpedia.org/resource/Q28640> } 
What profession utilizes algebra?