Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.

Who is Claudios lover in Much Ado About Nothing?
claudio

Grace Anna Goodhue was the wife of which US President?
grace coolidge

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 ?
alfred fielding