What is the {followed by} and the {discoverer or inventor} of {Impressionism} ?
The discovery and invention of impressionism was by who?  and was it followed by future impressionist?
Who discovered or invented Impressionism and was followed by future Impressionists?
SELECT ?c ?e WHERE { resource:Impressionism property:discoverer_or_inventor ?e . resource:Impressionism property:followed_by ?c }
 SELECT ?ans_1 ?ans_2 WHERE { ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q40415> . ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P156> . ?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/Q40415> . ?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P61> . ?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?ans_2. } 
SELECT ?ans_1 ?ans_2 WHERE { wd:Q40415 wdt:P156 ?ans_1 . wd:Q40415 wdt:P61 ?ans_2 }
Post-Impressionism Claude Monet Post-Impressionism Louis Leroy Post-Impressionism Francesco Filippini