instruction:
Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
question:
Andy Schleck competes in what sport at an international level?
answer:
andy schleck


question:
Besides the Caucasus, what mountain range forms the border of Europe and Asia?
answer:
asia


question:
Which material, invented by Alfred Fielding and Marc Chavannes and used to protect damage Was originally used as a textured wallpaper and celebrated 50 years of popular use in 2010 ?
answer:

alfred fielding