TASK DEFINITION: We would like you to classify each of the following sets of argument pairs (discussing Gun Control)  into either SIMILAR or NOT SIMILAR. A pair of arguments is considered SIMILAR if the arguments are about the same FACET (making the same argument), and is considered NOT SIMILAR if they do not have the same FACET. A FACET is a low level issue that often reoccurs in many arguments in support of the author's stance or in attacking the other author's position.
PROBLEM: Sent1: If a gun used to commit crimes isn't found in the registry, then the registry isn't much of a valuable crime fighting tool is it?
 Sent2: Most violent crime with guns occurs at knife fighting range.

SOLUTION: Not similar

PROBLEM: Sent1: DC doesn't need to have an age restriction on gun ownership, because no matter what their laws say, you still have to be at least 18 to pass a federal background check to buy a gun.
 Sent2: No it's federal law that you have to run background checks in order to keep your FFL (federal firearms license) which allows you to legally sell guns.

SOLUTION: Not similar

PROBLEM: Sent1: Criminals kill people so gun haters like gun hater pilot want to pass gun control laws that only law abiding citizens obey!
 Sent2: The only people that obey gun control laws that prevent people from taking guns any where are law abiding people.

SOLUTION:
Similar