You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
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.

If gun bans worked there would be no gun deaths in the countries that have banned guns.
Solution: Valid
Why? It is an argument that claims that gun bans will not work.

New input: [Exempting the Vice President, federal judicial and executive officers, congressmen and congressional officers, custom-house officers and clerks, post-officers and postal stage drivers, ferrymen on post roads, export inspectors, pilots, merchant mariners, and people exempted under the laws of their states
Solution:
Invalid