Question: What Shakespearean play named after a King of the Britons recorded by the medieval scribe Geoffrey of Monmouth included a character  considered a villain, obsessed with power and overthrowing her elderly father?
Sentence (from "Goneril"): Along with her sister Regan, Goneril is considered a villain, obsessed with power and overthrowing her elderly father as ruler of the kingdom of Britain.
Relevant evidence: Yes