https://qanswer-frontend.univ-st-etienne.fr/
I tried "who was harry potter's aunt?" on it but that didn't seem to work. I tried googling the same question and Google gave me the correct answer. I think that Google, despite result skew, is pretty powerful sometimes.
I asked Alexa the same question and she returned the correct answer as well.
https://www.wikidata.org/wiki/Q3244512
Google can be disappointing, however, when you want to ask a question few people have thought of. It would be hard to get a clear answer to "which family had the most members in Harry Potter?" etc, whereas that's a query you can write pretty naturally with a graph database, RDF or otherwise.
I'd never say that I wish we just had massive triple stores and Google had never been invented, but I still maintain that linked data is exciting and expressive.