What is {chronology of topic} of {subject} of {Irina Rossius} ?
What are the topics, in chronological order, that Irina Rossius talked about?
What are the topics,  in chronological order, of Irina Rossius?
SELECT ?r WHERE { resource:Irina_Rossius property:field_of_work ?t . ?t property:history_of_topic ?r }
SELECT ?answer WHERE { ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q23656509> . ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P101>. ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?X . ?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> ?X. ?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P2184> . ?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?answer . }
SELECT ?answer WHERE { wd:Q23656509 wdt:P101 ?X . ?X wdt:P2184 ?answer}