Please answer the following question: Information:  - Birmingham is a major city and metropolitan borough of West Midlands, England. It is the largest and most populous British city outside London, with a population in 2014 of 1,101,360. The city is in the West Midlands Built-up Area, the third most populous urban area in the United Kingdom, with a population of 2,440,986 at the 2011 census. Birmingham's metropolitan area is the second most populous in the UK with a population of 3.8 million. This also makes Birmingham the 9th most populous metropolitan area in Europe.  - The Borough of Dacorum is a local government district in Hertfordshire, England that includes the towns of Hemel Hempstead, Berkhamsted, Tring and the western part of Kings Langley. The district, which was formed in 1974, had a population of 137,799 in 2001. Its name was taken from the old hundred of Dacorum which covered approximately the same area.  - Croxley Green is a large suburb of Rickmansworth and a civil parish in England of approximately 5,000 dwellings and 12,000 residents. Located between Watford to the northeast, and Rickmansworth to the southwest in Hertfordshire, it is northwest of London.  - England is a country that is part of the United Kingdom. It shares land borders with Scotland to the north and Wales to the west. The Irish Sea lies northwest of England and the Celtic Sea lies to the southwest. England is separated from continental Europe by the North Sea to the east and the English Channel to the south. The country covers five-eighths of the island of Great Britain (which lies in the North Atlantic) in its centre and south; and includes over 100 smaller islands such as the Isles of Scilly, and the Isle of Wight.  - Berkhamsted is a medium-sized historic market town on the western edge of Hertfordshire, England. The affluent commuter town is located in the small Bulbourne valley in the Chiltern Hills, northwest of London. Berkhamsted is a civil parish, with a town council within the larger borough of Dacorum.  - Tring is a small market town and civil parish in the Borough of Dacorum, Hertfordshire, England. Situated in a gap passing through the Chiltern Hills, classed as an Area of Outstanding Natural Beauty, north-west of London, and linked to London by the old Roman road of Akeman Street, by the modern A41, by the Grand Union Canal and by rail lines to Euston Station. As of 2013 Tring has a population of 11,730.  - The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a sovereign country in western Europe. Lying off the north-western coast of the European mainland, it includes the island of Great Britain (the name of which is also loosely applied to the whole country), the north-eastern part of the island of Ireland, and many smaller islands. Northern Ireland is the only part of the UK that shares a land border with another sovereign statethe Republic of Ireland. Apart from this land border, the UK is surrounded by the Atlantic Ocean, with the North Sea to its east, the English Channel to its south and the Celtic Sea to its south-south-west, giving it the 12th-longest coastline in the world. The Irish Sea lies between Great Britain and Ireland. With an area of , the UK is the 78th-largest sovereign state in the world and the 11th-largest in Europe. It is also the 21st-most populous country, with an estimated 65.1 million inhabitants. Together, this makes it the fourth most densely populated country in the European Union.  - Rickmansworth is a small town in south-west Hertfordshire, England, situated approximately northwest of central London and inside the perimeter of the M25 motorway. The town is mainly to the north of the Grand Union Canal (formerly the Grand Junction Canal) and the River Colne. The nearest large town is Watford, approximately to the east. Rickmansworth is the administrative seat of the Three Rivers District Council, the local authority named from the confluence of three rivers within its borders. The River Gade and the Grand Union Canal join the upper River Colne near Rickmansworth's eastern boundary and are joined by the River Chess near the town centre from where the enlarged Colne flows south to form a major tributary of the River Thames. The town is served by the Metropolitan Line of the London Underground & Chiltern Railways route London Marylebone to Aylesbury.   - The Grand Union Canal in England is part of the British canal system. Its main line starts in London and ends in Birmingham, stretching for with 166 locks. It has arms to places including Leicester, Slough, Aylesbury, Wendover and Northampton.  - Kings Langley is a historic village and civil parish in Hertfordshire, England, northwest of central London to the south of the Chiltern Hills and now part of the London commuter belt. The village is divided between two local government districts by the River Gade with the larger western portion in the Borough of Dacorum and smaller part, to the east of the river, in Three Rivers District.  - Aylesbury is the county town of Buckinghamshire, England. In 2011, it had a population of 71,977 but the greater urban area had a population of 74,748.  - Nash Mill was a paper mill in Hemel Hempstead, Hertfordshire, United Kingdom. The local residential area (Nash Mills) takes its name from the mill.  - A borough is an administrative division in various English-speaking countries. In principle, the term "borough" designates a self-governing walled town, although in practice, official use of the term varies widely.  - Buckinghamshire (or ), abbreviated Bucks, is a county in South East England which borders Greater London to the south east, Berkshire to the south, Oxfordshire to the west, Northamptonshire to the north, Bedfordshire to the north east and Hertfordshire to the east.  - The East of England is one of nine official regions of England at the first level of NUTS for statistical purposes. It was created in 1994 and was adopted for statistics from 1999. It includes the ceremonial counties of Bedfordshire, Cambridgeshire, Essex, Hertfordshire, Norfolk and Suffolk. Essex has the highest population in the region.  - Nash Mills is a civil parish within Hemel Hempstead and Dacorum Borough Council on the northern side of the Grand Union Canal , formerly the River Gade , and in the southernmost corner of Hemel Hempstead . It takes its name from the mill owned by John Dickinson in the 19th century ( Nash Mill ) . Part of its area was reassigned in the 1980s from Three Rivers District Council & Abbots Langley Civil Parish . The borough council ward extends beyond the parish boundary .  - Northampton is the county town of Northamptonshire in the East Midlands of England. It lies on the River Nene, about north-west of London and south-east of Birmingham. One of the largest towns in the UK, Northampton had a population of 212,100 in the 2011 census.  - Leicester is a city and unitary authority area in the East Midlands of England, and the county town of Leicestershire. The city lies on the River Soar and at the edge of the National Forest.  - The Chiltern Hills form a chalk escarpment in South East England. They are known locally as "the Chilterns". A large portion of the hills was designated officially as an Area of Outstanding Natural Beauty in 1965.  - Hertfordshire (often abbreviated Herts) is a county in southern England, bordered by Bedfordshire to the north, Cambridgeshire to the north-east, Essex to the east, Buckinghamshire to the west and Greater London to the south. For government statistical purposes, it is placed in the East of England region.  - Hemel Hempstead is a large new town in Hertfordshire in the East of England, northwest of London and part of the Greater London Urban Area. The population according to the 2001 Census was 81,143, and at the 2011 census was 94,932. Developed after the Second World War as a new town, it has existed as a settlement since the 8th century and was granted its town charter by King Henry VIII in 1539. It is part of the district (and borough since 1984) of Dacorum and the Hemel Hempstead constituency.  - Slough is a large town in Berkshire, England, west of London, north of Windsor, east of Maidenhead, south-east of High Wycombe and north-east of Reading. The town was historically part of Buckinghamshire. The A4 and the Great Western Main Line pass through it. In 2011, Slough's population of 140,200 was the most ethnically diverse in the United Kingdom outside London with the highest proportion of religious adherents in England.  - The River Gade is a river running almost entirely though Hertfordshire. It rises from a spring in the chalk of the Chiltern Hills at Dagnall, Buckinghamshire and flows through Hemel Hempstead, Kings Langley, then along the west side of Watford through Cassiobury Park. After passing Croxley Green it reaches Rickmansworth, where it joins the River Colne. For its whole course the Gade is unnavigable.  - Wendover is a market town at the foot of the Chiltern Hills in Buckinghamshire, England. It is also a civil parish within Aylesbury Vale district. The mainly arable parish is in size and contains many hamlets that nestle in amongst the lush forest on the surrounding hills.  - Cassiobury Park is the principal public park in Watford, Hertfordshire, in England. It was created in 1909 from the purchase by Watford Borough Council of part of the estate of the Earls of Essex around Cassiobury House which was subsequently demolished in 1927. It comprises over and extends from the A412 Rickmansworth Road in the east to the Grand Union Canal in the west, and lies to the south of the Watford suburb of Cassiobury, which was also created from the estate. The western part is a 25.1 hectare Local Nature Reserve managed by the Herts and Middlesex Wildlife Trust.  - Dagnall is a village in the parish of Edlesborough Northall and Dagnall (where the 2011 Census population was included), in Buckinghamshire, England.  - Watford is a town and borough in Hertfordshire, England, situated northwest of central London and inside the circumference of the M25 motorway. It is not to be confused with Watford, Northamptonshire which is 55 miles to the north.  - Chalk is a soft, white, porous, sedimentary carbonate rock, a form of limestone composed of the mineral calcite. Calcite is an ionic salt called calcium carbonate or CaCO. It forms under reasonably deep marine conditions from the gradual accumulation of minute calcite shells (coccoliths) shed from micro-organisms called coccolithophores. Flint (a type of chert unique to chalk) is very common as bands parallel to the bedding or as nodules embedded in chalk. It is probably derived from sponge spicules or other siliceous organisms as water is expelled upwards during compaction. Flint is often deposited around larger fossils such as Echinoidea which may be silicified (i.e. replaced molecule by molecule by flint).    What is the relationship between 'nash mills' and 'hertfordshire'?
Answer:
located in the administrative territorial entity