Thank you for pointing out the link issue, Hopefully thats fixed now as I get little icons, strange.
On the question of questions, they come from a number of sources such as question databases and I have generated them over a number of years as I am a keen pub quiz player, a popular pastime in the UK. However I have also written an algorithm, currently being completed along with loads of other crap. It’s a sort of non intelligent question generator. You give it a list of stuff like list of films and a set of properties say date, film, actors, character, directors it then runs using a set of SPARQL enquiries to generate questions and answers (1 correct and 3 distractors) classifying the difficulty level by searching sources like wikipedia, IMDB etc . It’s a bit clunky, takes a while to run but dumps a csv file with all the questions in it. Example give it a list of films, writes questions like who was the lead actor in Film A ? what was the year of release ? What was the character name played by actor X ? etc but you can vary the subject such as football, Which of these players played for Manchester United? etc. I looked at something a bit cleverer an AI based but research showed me even the cutting edge algorithms really struggling to extract questions from text so currently stuck with list of stuff and properties idea, seems to work okay even though the questions can be slightly repetitive. I just adapt the language using NLP to ask the same thing a number of different ways. I hope that helps, I will try to refine the question generator in time its written in Lua. Take care