SELECT DISTINCT ?item #?itemLabel  
?article ?bool 
WHERE {
  ?item wdt:P496 ?orcid.
    
   {
      ?article schema:about ?item .
      ?article schema:inLanguage "en" .
      FILTER (SUBSTR(str(?article), 1, 25) = "https://en.wikipedia.org/")
  }
 OPTIONAL {   
   SELECT ?item ?pageid ?ns WHERE {
    SERVICE wikibase:mwapi {
      bd:serviceParam wikibase:endpoint "en.wikipedia.org" .
      bd:serviceParam wikibase:api "Generator" .
      bd:serviceParam mwapi:generator "search" .
      bd:serviceParam mwapi:gsrsearch "hastemplate:Scholia" .
      bd:serviceParam mwapi:gsrlimit "max" .
      ?item wikibase:apiOutputItem mwapi:item .
      ?pageid wikibase:apiOutput "@pageid" .
      ?ns wikibase:apiOutput "@ns" .
    }
  } LIMIT 150
 }

  BIND( IF(BOUND(?article),   IF(BOUND(?ns), "yes" , "no" )  ,  "no"   )  AS ?bool).  
  
#  SERVICE wikibase:label { bd:serviceParam wikibase:language "en". }
}