Query: Along with the guilt-innocence phase, what is the other phase of a death penalty trial under Gregg v. Georgia?
Context: In 1976, contemporaneously with Woodson and Roberts, the Court decided Gregg v. Georgia and upheld a procedure in which the trial of capital crimes was bifurcated into guilt-innocence and sentencing phases. At the first proceeding, the jury decides the defendant's guilt; if the defendant is innocent or otherwise not convicted of first-degree murder, the death penalty will not be imposed.