query: #Wikidata scientific articles that contain "zika" in the title
  SELECT ?item ?itemLabel ?_PubMed_ID WHERE {
    ?item wdt:P31 wd:Q13442814.
    SERVICE wikibase:label {
      bd:serviceParam wikibase:language "en".
      ?item rdfs:label ?itemLabel.
    }
    FILTER(CONTAINS(LCASE(?itemLabel), "zika"))
    MINUS  { { ?item wdt:P921 wd:Q202864 . } UNION { ?item wdt:P921 wd:Q8071861 . } }
    OPTIONAL { ?item wdt:P698 ?_PubMed_ID. }
  }
  LIMIT 1000