What is {position held} of {Vannevar Bush} that is {of} is {MIT Corporation} ?
What was Vannevar Bush's rule in the MIT Corporation?
What position did Vannevar Bush hold for the MIT Corporation?
SELECT ?x WHERE { ?y property:of resource:MIT_Corporation . resource:Vannevar_Bush property:position_held ?y . ?y property:position_held ?x }
select distinct ?obj  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q299595> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P39> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj .
?statement <http://www.wikidata.org/entity/P642> <http://wikidata.dbpedia.org/resource/Q17379555>
} 

SELECT ?obj WHERE { wd:Q299595 p:P39 ?s . ?s ps:P39 ?obj . ?s pq:P642 wd:Q17379555 }