title: Mayor of San Francisco
context: The current mayor is former District 5 Supervisor and President of the Board of Supervisors London Breed, who won a special election following the death of Mayor Ed Lee on December 12, 2017.  Breed will serve out the remainder of Lee's uncompleted term (until January 8, 2020), after which she is eligible to run for two full terms of her own.[3][4]
question: Who is the Mayor of San Francisco?
answers: London Breed