#gem install sparql
#http://www.rubydoc.info/github/ruby-rdf/sparql/frames

require 'sparql/client'

endpoint = "{ENDPOINT_URL}"
sparql = {SPARQL_QUERY}

client = SPARQL::Client.new(endpoint,
                            :method => :get,
                            # TODO adjust user agent; see https://w.wiki/CX6
                            headers: {'User-Agent' => 'WDQS-example Ruby'})
rows = client.query(sparql)

puts "Number of rows: #{rows.size}"
for row in rows
  for key,val in row do
    # print "#{key.to_s.ljust(10)}: #{val}\t"
    print "#{key}: #{val}\t"
  end
  print "\n"
end