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 plaintiffs seek to test their tax liabilities in an action for an injunction and for removal of the cloud cast upon their properties by the tax liens. The judgment of the District Court dismissing these complaints is affirmed for the reasons stated by the District Judge
We recently considered similar contentions and held them unavailing. At about the same time the Second and Third Circuits arrived at the same conclusion.
Affirmed.
. 235 F.Supp. 276.
. Broadwell v. United States, 4 Cir., 343 F.2d 470.
. Falik v. United States, 2 Cir., 343 F.2d 38; Quinn v. Hook, 3 Cir., 341 F.2d 920.

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