Question: Hans F. Sennholz was a prolific author who studied under a theoretical Austrian School economist best known for his work on praxeology, a study of what?
Sentence (from "Hans Sennholz"): A Luftwaffe pilot during World War II, he was shot down over North Africa on 31 August 1942, and spent the remainder of the war in a POW camp in the United States.
Relevant evidence: No