Task: Text Categorization
Input (English): This play ends with the main characters being clad in red robes and led offstage in a ceremonial torchlight procession. Several characters in this play successively throw black and white pebbles into a container, and discover that it contains an equal number of black and white pebbles. The main characters of this play sing the "Binding Song" to hold the protagonist hostage at an altar. This play begins with the Pythia of the shrine of Apollo rushing onstage in terror upon discovering the protagonist with his hands covered in (*) blood. This play shifts settings to the Areopagus, where jurors led by Athena try the protagonist for the murder of his father, Agamnenon. Ending with the title characters being renamed the "kindly ones," for 10 points, name this final play of the Oresteia.
Output (English): Literature