instruction:
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.
question:
There are also people who will tell you that the death penalty actually kills innocent people.
answer:
Valid


question:
In reality, prison population is a zero sum game because nobody wants a new prison in their back yard (NIMBY principle).
answer:
Valid


question:
Both the death penalty and a life sentence would have prevent further murders.
answer:

Valid