The best way to remember the causes of World War I, World War I we're talking about 1914-15 to 1918-19, so it's about a four year war. Tens of millions of people are going to die in this war. It's a very hands-on, gritty, trench warfare, in-your-face war. I mean, you'd have 20,000 people die and they'd win 18 feet of land, so it's just nuts. But in terms of why it happened, there's a very easy kind of anagram to learn, a word where each letter means something. I don't even know if that's an anagram, maybe. But nevertheless, I always remember the main spark of World War I.