These are all from George Reisman's Blog on Economics, Politics, Society, and Culture: 140th Birthday Tribute to Ludwig von Mises (I got think link from your post here)
Level 1
Von Mises was not primarily anti-socialist.
Level 2
Von Mises demonstrated that competition under capitalism is of an entirely different character than competition in the animal kingdom.
Level 3
He argued with unanswerable logic that the economic causes of war are the result of government interference, in the form of trade and migration barriers, and that such interference restricting foreign economic relations is the product of other government interference, restricting domestic economic activity.
I think that the difference between level 2 and level 3 could’ve been greater. Level 3 included participles which I was getting wrong up until last time I practised grammar though. Apart from that it’s only really the size of the sentence that makes it harder. I’m going to try and find one that is quite hard for me. I think I’ll look at sentences by another writer because I’ve done a lot of Reisman and he’s got a consistent style.
All these trees were quite quick for me. The level 3 i estimate took less than 10 mins to do. The others were less.