clean up some import error

findProblems.rq

SELECT (SUBSTR(STR(?wikidata),32) AS ?qid)
  (CONCAT("\"\"\"", ?inchikey_, "\"\"\"") AS ?inchikey)
  (CONCAT("\"\"\"", ?inchi_, "\"\"\"") AS ?inchi)
  (CONCAT("\"\"\"", ?chemform_, "\"\"\"") AS ?chemform)
  (CONCAT("\"\"\"", ?smiles_, "\"\"\"") AS ?smiles)
  (CONCAT(str(?mass_), "U483261") AS ?mass)
WHERE {
  VALUES ?inchikey_ { "WSYNAKWAAXYNMW-DEOSSOPVSA-N" "PTCHLTYDAIWNSD-SSDOTTSWSA-N" "GAZIIOYXDWTTMC-GFCCVEGCSA-N" "CIUYPOUJRYWLDF-QFIPXVFZSA-N" "HAGZRCCJXLGJTR-BDAKNGLRSA-N" }
  ?wikidata wdt:P235 ?inchikey_ ;
            wdt:P234 ?inchi_ ;
            wdt:P274 ?chemform_ ;
            wdt:P2017 ?smiles_ ;
            wdt:P2067 ?mass_ .
}