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:
An argument for putting people to death is so that they can never escape and kill again.
answer:
Valid


question:
They, when they heard it, being convicted by their conscience, went out one by one, beginning from the oldest, even to the last.
answer:
Invalid


question:
~A 1991 study of the Texas criminal justice system estimated the cost of appealing capital murder at $2,316,655.
answer:

Valid