I want to know the answer to the following question:
What county did the city of Southampton become administratively independent of in April of 1997?
All the background I'm provided with is that "The city has undergone many changes to its governance over the centuries and once again became administratively independent from Hampshire County as it was made into a unitary authority in a local government reorganisation on 1 April 1997, a result of the 1992 Local Government Act.". Is that enough to answer the question?