let
  GetLabel = (subject as text) as nullable table =>
    let 
      // Request Ntriples from the LDF Service
      Options = [Headers = [#"Accept"="text/csv"]],
      FixedSubject = if Text.At(subject,0) <> "<" then Text.Combine({"<",subject,">"}) else subject,
      Query = Text.Combine({"SELECT ?label WHERE {
        SERVICE wikibase:label {
        bd:serviceParam wikibase:language ""en"" .
        ",FixedSubject," <http://www.w3.org/2000/01/rdf-schema#label> ?label
        }
      }"}),
      /* this is a multiline comment, see https://docs.microsoft.com/en-us/powerquery-m/comments
      */
      url = Text.Combine({"https://query.wikidata.org/sparql?",Uri.BuildQueryString([query=Query])}),
      data = Csv.Document(Web.Contents(url,Options)),
      promoted = Table.PromoteHeaders(data, [PromoteAllScalars=true])
    in 
      promoted 
in
  GetLabel