query: SELECT DISTINCT ?item ?article_title 
  WHERE {
    hint:Query hint:optimizer "None".
    {SERVICE wikibase:mwapi {
      bd:serviceParam wikibase:api "Search";
                      wikibase:endpoint "www.wikidata.org";
                      mwapi:srsearch "\"phase 1\" trial haswbstatement:P31=Q13442814".
      ?title wikibase:apiOutput mwapi:title.
    }}
  UNION {
    SERVICE wikibase:mwapi {
      bd:serviceParam wikibase:api "Search";
                      wikibase:endpoint "www.wikidata.org";
                      mwapi:srsearch "\"phase i\" trial haswbstatement:P31=Q13442814".
      ?title wikibase:apiOutput mwapi:title.
    }
    }
    BIND(IRI(CONCAT(STR(wd:), ?title)) AS ?item)
    FILTER NOT EXISTS { ?item wdt:P921 wd:Q42824069. }
    ?item wdt:P1476 ?article_title .
  }
  # LIMIT 10000