You will be given a definition of a task first, then some input of the task.
In this task, you are given a context, a subject, a relation, and many options. Based on the context, from the options select the object entity that has the given relation with the subject. Answer with text (not indexes).

Context: The London postal district is the area in England of to which mail addressed to the LONDON post town is delivered. The General Post Office at the control of the Postmaster General directed Sir Rowland Hill to devise the area in 1856 and throughout its history has been subject to gradual periodic reorganisation and division into increasingly smaller postal units, with the early loss of two compass points and a minor retraction in 1866. It was integrated by the Post Office into the national postcode system of the United Kingdom during the early 1970s and corresponds to the N, NW, SW, SE, W, WC, E and EC postcode areas. The postal district has also been known as the London postal area. The County of London was much smaller at , but Greater London is much larger at ., The London Borough of Waltham Forest is a London borough in East London, England.
The north and south of the borough, split by the North Circular Road, contrast markedly in terms of ethnicity and socio-economic indicators, with built-up urban districts in the south having inner-city characteristics, and more affluent residential development in the north with open spaces, parks, and playing fields. The borough is between Epping Forest/Essex in the north, Redbridge in the east, Newham and Hackney in the south, and Haringey and Enfield in the west, where the River Lea and Lea Valley and the surrounding parkland forms a green corridor separating north and east London. Waltham Forest was one of the six London boroughs that hosted the 2012 Summer Olympics. The local authority is Waltham Forest London Borough Council. Major districts are Leyton and Leytonstone in the south, Walthamstow in the middle, and Chingford in the north., The 14 British Overseas Territories (BOT) are territories under the jurisdiction and sovereignty of the United Kingdom. They are those parts of the former British Empire that have not chosen independence or have voted to remain British territories. Most of the inhabited territories are internally self-governing, with the UK retaining responsibility for defence and foreign relations. The rest are either uninhabited or have a transitory population of military or scientific personnel. They share the British monarch (Elizabeth II) as head of state., Walthamstow was a local government district in southwest Essex, England from 1873 to 1965, around the town of Walthamstow. It was within the London suburbs, forming part of the London postal district and Metropolitan Police District. Its former area now corresponds to the central part of the London Borough of Waltham Forest in Greater London., In modern politics and history, a parliament is a legislative, elected body of government. Generally a modern parliament has three functions: representing the electorate, making laws, and overseeing the government ("i.e.", hearings, inquiries)., The Palace of Westminster is the meeting place of the House of Commons and the House of Lords, the two houses of the Parliament of the United Kingdom. Commonly known as the Houses of Parliament after its occupants, it is also known as the 'heart of British politics'. The Palace lies on the north bank of the River Thames in the City of Westminster, in central London., The Metropolitan Police District (MPD) is the police area which is policed by the Metropolitan Police Service in London. It currently consists of Greater London, excluding the City of London. The Metropolitan Police District was created by the Metropolitan Police Act 1829 as an ad hoc area of administration because the built up area of London spread at the time into many parishes and counties without an established boundary. The district expanded as the built up area grew and stretched some distance into rural land. When county police were set up in England the forces of Essex, Hertfordshire, Kent and Surrey did not include those parts of the counties within the MPD and Middlesex did not have a county force. Similarly, boroughs in the MPD that elsewhere would have been entitled to their own police force did not have them. , The City of Westminster is an Inner London borough which also holds city status. It occupies much of the central area of Greater London including most of the West End. It is to the west of and adjoining the ancient City of London, directly to the east of the Royal Borough of Kensington and Chelsea, and its southern boundary is the River Thames. It was created with the 1965 establishment of Greater London. Upon creation, Westminster was awarded city status, which had been previously held by the smaller Metropolitan Borough of Westminster., Walthamstow East was a parliamentary constituency in what was then the Municipal Borough of Walthamstow in east London . It returned one Member of Parliament ( MP ) to the House of Commons of the Parliament of the United Kingdom , elected by the first - past - the - post voting system . The constituency was created for the 1918 general election , and abolished for the February 1974 general election , when it was combined with part of the former Walthamstow West to form the new Walthamstow constituency . However , Hale End ward was added to the new Chingford constituency ., The Parliament of the United Kingdom, commonly known as the UK Parliament or British Parliament, is the supreme legislative body in the United Kingdom, British Crown dependencies and British overseas territories. It alone possesses legislative supremacy and thereby ultimate power over all other political bodies in the UK and its territories. Its head is the Sovereign of the United Kingdom (currently Queen Elizabeth II) and its seat is the Palace of Westminster in the City of Westminster, London., A Member of Parliament (MP) is the 
representative of the voters to a parliament. In many countries with bicameral parliaments, this category includes specifically members of the lower house, as upper houses often have a different title., Walthamstow (or ) is the principal town of the London Borough of Waltham Forest in East London, England. It is located northeast from Charing Cross., Subject: walthamstow east , Relation: located_in_the_administrative_territorial_entity, Options: (A) central (B) city of london (C) county of london (D) district (E) east london (F) elizabeth (G) epping forest (H) essex (I) greater london (J) hill (K) independence (L) inner london (M) kensington (N) london (O) london borough of waltham forest (P) mail (Q) middlesex (R) of (S) road (T) southwest (U) split (V) surrey (W) time (X) united kingdom (Y) walthamstow (Z) westminster
Output:
essex