Question: Which Frank Lloyd Wright house between the 1950's and 60's is the largest of the Usonian Automatics built: Theodore A. Pappas House, or Gerald B. and Beverley Tonkens House?
Sentence (from "Theodore A. Pappas House"): The Pappas house was listed on the National Register of Historic Places in 1979, when it was only 15 years old.
Relevant evidence: No