TASK DEFINITION: We would like you to assess the QUALITY of each of the following argument (discussing Death Penalty) 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 death penalty. An invalid argument is a phrase that cannot be interpreted as an argument or not on the topic of death penalty.
PROBLEM: Acutally, long ago, the executioner was a convict also sentenced to death.

SOLUTION: Valid

PROBLEM: To me, the system's job is one thing: To prevent a similar crime from happening again, not to fulfill a concept that we have invented.

SOLUTION: Valid

PROBLEM: The death penalty is not about only deterrence, but also to say that life will be protected and murder will not be tolerated.

SOLUTION:
Valid