https://www.dailydishnews.org.uk/post/duolingos-luis-von-ahn-wants-to-delete-the-blockchain-z23vc2<meta http-equiv='refresh' content='0;url=https://www.dailydishnews.org.uk/post/duolingos-luis-von-ahn-wants-to-delete-the-blockchain-z23vc2'>