We would like you to assess the QUALITY of each of the following argument (discussing Gun Control) and determine if the argument is Valid or Invalid. A valid argument is clearly interpretable and either expresses an argument, or a premise or a conclusion that can be used in an argument for the topic of gun control. An invalid argument is a phrase that cannot be interpreted as an argument or not on the topic of gun control.

Example Input: They explain why assault weapons are favored by terrorists, mass killers, and violent criminals, and they distinguish such weapons from true hunting and target guns.
Example Output: Valid

Example Input: If a registered gun owner uses his gun to commit a crime, (besides running the risk of threatening armed citizens) he would be easily tracked down and apprehended.
Example Output: Valid

Example Input: To purchase a firearm in a commercial shop, one needs to have a Waffenerwerbsschein (weapon acquisition permit).
Example Output:
Valid