query: #defaultView:ImageGrid
  SELECT ?item ?itemLabel ?tedtalkLabel ?image WHERE {
    ?item wdt:P166 wd:Q18748039.
    ?item wdt:P2611 ?ted.
    OPTIONAL { ?item wdt:P18 ?image. }
    ?tedtalk wdt:P31 wd:Q23011722.
    ?tedtalk wdt:P50 ?item.
    SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en". }
  }