Answer the following question: Information: - Bicester is a town and civil parish in the Cherwell district of northeastern Oxfordshire in England. - Middle Aston is a hamlet and civil parish about 7 miles ( 11 km ) northwest of Bicester . It used to have a country house , Middle Aston House , but this was demolished early in the 19th century . The house was replaced in the 1890s by extending the manor farmhouse . The building is now a conference center . - Oxfordshire (or ; abbreviated Oxon) is a county in South East England bordering on Warwickshire (to the north/north-west), Northamptonshire (to the north/north-east), Buckinghamshire (to the east), Berkshire (to the south), Wiltshire (to the south-west) and Gloucestershire (to the west). - Oxford is a city in the South East region of England and the county town of Oxfordshire. With a population of 159,994 it is the 52nd largest city in the United Kingdom, and one of the fastest growing and most ethnically diverse. The city is situated from London, from Bristol, from both Southampton and Birmingham and from Reading. What entity does 'middle aston' has the relation 'located in the administrative territorial entity' with?
Answer:
oxfordshire