Task: songer_usc1

What follows is an opinion from a United States Court of Appeals.
Your task is to identify the most frequently cited title of the U.S. Code in the headnotes to this case. Answer "0" if no U.S. Code titles are cited. If one or more provisions are cited, code the number of the most frequently cited title.

PER CURIAM:
The “concurrent sentences” rule first announced in Sinclair v. United States, 279 U.S. 263, 299, 49 S.Ct. 268, 73 L.Ed. 692 (1929) and consistently adhered to by the Supreme Court (Lawn v. United States, 355 U.S. 339, 359, 78 S.Ct. 311, 2 L.Ed.2d 321 (1958), Greene v. United States, 358 U.S. 326, 330, 79 S.Ct. 340, 3 L.Ed.2d 340 (1959)) makes unnecessary any examination into appellant’s sole assignment of error which attacks the validity of one of several convictions under a multi-count indictment.
We have nevertheless considered the assignment; granted the criticized instruction should not have been given, the conclusion is manifest that the error was harmless. Chapman v. California, 386 U.S. 18, 87 S.Ct. 824, 17 L.Ed.2d 705 (1967).
Affirmed.

Question: What is the most frequently cited title of the U.S. Code in the headnotes to this case? Answer with a number.
Answer:

Answer: 0