What is {namesake} of {Van der Waals equation}, that has {died on} is {1923-3-8} ?
"Who is the namesake of Van der Waals equation, who died in 1923-3-8?"
SELECT ?answer WHERE { wd:Q254329 wdt:P138 ?answer . ?answer wdt:P570 ?x FILTER(contains(YEAR(?x),'1923'))}
SELECT ?answer WHERE { ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q254329> . ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P138>. ?statement1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?answer . ?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> ?answer. ?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P570> . ?statement2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <1923-3-8> . }
"Who is the namesake of Van der Waals equation, who died in 1923-3-8?"