Question: In which Chinese province was the 2014 Summer Youth Olympics held ?
Sentence (from "Nanjing"): The inner area of Nanjing enclosed by the city wall is Nanjing City (南京城), with an area of 55 km, while the Nanjing Metropolitan Region includes surrounding cities and areas, covering over 60 thousand square kilometres, with a population of over 30 million.
Relevant evidence: No