Take context from the input text and decide on the accurate relationship between 'chief' and 'New York City' from the options provided.
Options: legal form, location of formation, owned by, platform

Mr Murdoch is a big admirer of Joel Klein, Amplify’s chief executive and the former head of education for New York City but the potential sale or winding down of News Corp’s involvement suggests that there are limits to that admiration.
location of formation