Task: songer_civproc1

What follows is an opinion from a United States Court of Appeals.
Your task is to identify the most frequently cited federal rule of civil procedure in the headnotes to this case. Answer "0" if no federal rules of civil procedure are cited. For ties, code the first rule cited.

PER CURIAM.
Upon the authority of the principle of law laid down in the cases of Hobbs v. McLean, 117 U.S. 567, 6 S.Ct. 870, 29 L.Ed. 940, and First National Bank of Atlanta v. Southern Cotton Oil Co., 5 Cir., 86 F.2d 33, the order of the district court, 46 F.Supp. 873, is affirmed.

Question: What is the most frequently cited federal rule of civil procedure in the headnotes to this case? Answer with a number.
Answer:

Answer: 0