I want to know the answer to the following question:
What amendment to the Constitution did Penry v. Lynaugh address?
All the background I'm provided with is that "The United States Supreme Court in Penry v. Lynaugh and the United States Court of Appeals for the Fifth Circuit in Bigby v. Dretke have been clear in their decisions that jury instructions in death penalty cases that do not ask about mitigating factors regarding the defendant's mental health violate the defendant's Eighth Amendment rights, saying that the jury is to be instructed to consider mitigating factors when answering unrelated questions.". Is that enough to answer the question?