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.

Ex Input:
The first thing you need to do when someone is charged with a crime is understand what the charge is and what must be proved.

Ex Output:
Valid


Ex Input:
For decades we have proved drug cases by having a scientist who tests the drug submit an affidavit which says ���its cocaine��� or ���its marijuana������without having to call the scientist to testify about his findings.

Ex Output:
Invalid


Ex Input:
Supposedly under Heller such a ban on future developments would be legal, because it only relates to new weaponry that is not yet available for general use by the public.

Ex Output:

Valid