What is the {aspect of history} for {facet of} of {polymerase chain reaction}
Clarify the chronicled prepare of a polymerase chain reaction.
Explain the historical process of a polymerase chain reaction.
SELECT DISTINCT ?q WHERE { ?q property:facet_of resource:polymerase_chain_reaction . ?q rdf:type ontology:aspect_of_history }
select distinct ?subj where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> ?subj . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P1269> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q176996> . ?subj <http://www.wikidata.org/entity/P31> <http://wikidata.dbpedia.org/resource/Q17524420> } 
 select distinct ?sbj where { ?sbj wdt:P1269 wd:Q176996 . ?sbj wdt:P31 wd:Q17524420 } 