Title: Frederic Chopin.
Question: What has current day research suggested that Chopin was suffering from alongside his other illnesses?

Title: Anti-aircraft warfare.
Question: In addition to ammo proposals, what other need was articulated?

Title: John von Neumann.
Question: In what way did von Neumann make spectacular contributions to measure theory?

Title: Professional wrestling.
Question:
What part of the world has wrestling become less popular in?