The word that provides the best context clue to the meaning of churning is turning.
I THINK it might be almost but im not sure
Answer:
John Richard ("Packed" or "J.R.") Simplot (/ˈsɪmplɒt/; January 4, 1909 – May 25, 2008) was an American entrepreneur and businessman best known as the founder of the J. R. Simplot Company, a Soda Springs, Idaho based agricultural supplier specializing in potato products.
The entries starting with Scarborough, Yatesburg, and Robinson are books.
They all have publishing companies.
The first is from a periodical. The 19.2 tells you the issue. The ones with Web are from the internet.