Question: Two of London's 33 districts are cities: the City of London (the historic centre including Smithfield and Holborn) and which other?
Sentence (from "Giltspur Street"): Giltspur Street is a street in Smithfield in the City of London, running north-south from the junction of Newgate Street, Holborn Viaduct and Old Bailey, up to West Smithfield, and it is bounded to the east by St Bartholomew's Hospital.
Relevant evidence: Yes