Task: Text Categorization
Input (English): This author wrote a play in which a woman dreams that she gives birth to a snake that bites at her breast, drawing both blood and milk. Another play by this author is set into motion when Eteocles refuses to step down as king, which prompts a group that includes Adrastus and Tydeus to invade the title city. This author wrote a trilogy in which the Furies are renamed "The Kindly Ones" after the title character is acquitted of his mother Clytemnestra's murder. For 10 points, name this ancient Greek playwright, the author of Seven Against Thebes and the Oresteia.
Output (English): Literature