Information: - Holyhead ( "Cybi's fort") is the largest town in the county of Isle of Anglesey in Wales. It is also a community and a major Irish Sea port, serving Ireland. - County Louth is a county in Ireland. It is in the province of Leinster and is part of the Border Region. It is named after the village of Louth. Louth County Council is the local authority for the county. The population of the county is 122,897 according to the 2016 census. - Belfast is the capital and largest city of Northern Ireland, the second largest on the island of Ireland, and the heart of the tenth largest Primary Urban Area in the United Kingdom. On the River Lagan, it had a population of 286,000 at the 2011 census and 333,871 after the 2015 council reform. Belfast was granted city status in 1888. - London is the capital and most populous city of England and the United Kingdom, as well as the most populous city proper in the European Union. Standing on the River Thames in the south east of the island of Great Britain, London has been a major settlement for two millennia. It was founded by the Romans, who named it "Londinium". London's ancient core, the City of London, largely retains its medieval boundaries. Since at least the 19th century, "London" has also referred to the metropolis around this core, historically split between Middlesex, Essex, Surrey, Kent, and Hertfordshire, which today largely makes up Greater London, governed by the Mayor of London and the London Assembly. - The 26 miles ( 42 km ) Dundalk , Newry and Greenore Railway ( DNGR , DN&GR ) was an Irish gauge ( 1,600 mm ( 5 ft 3 in ) ) railway in Ireland . It was conceived in the 1860s to provide a link between the towns in its title and the London and North Western Railway port at Greenore , from where a ferry service operated to Holyhead . It was opened between Greenore and Dundalk in 1873 and extended to Newry in 1876 . The company operated an hotel at Greenore . - A townland is a small geographical division of land used in Ireland. The townland system is of Gaelic origin, pre-dating the Norman invasion, and most have names of Irish Gaelic origin. However, some townland names and boundaries come from Norman manors, plantation divisions, or later creations of the Ordnance Survey. The total number of inhabited townlands was 60,679 in 1911. The total number recognised by the Irish Place Names database as of 2014 was 61,098, including uninhabited townlands, mainly small islands. - Saint Cybi (in Welsh) or Saint Cuby (in Cornish) was a 6th-century Cornish bishop, saint and, briefly, king, who worked largely in North Wales: his biography is recorded in two slightly variant medieval 'lives'. - Dundalk Bay is a large (33km), exposed estuary on the east coast of Ireland. The inner bay is shallow, sandy and intertidal, though it slopes into a deeper area 2km from the transitional water boundary. It is predominantly influenced by the sea, though several rivers drain into the bay from the west. In the northwest corner of the bay, the Castletown River cuts through the intertidal zone and the smaller River Fane flows into the southeast corner. While the bay is largely made up of intertidal flats, there is a significant area of salt marsh on the western shore. The catchment around the bay is of mixed agriculture and urban land use. The Castletown River is routinely dredged for navigation purposes for the deep water port of Dundalk. Rivers. Rivers which flow into Dundalk Bay: - Wales is a country that is part of the United Kingdom and the island of Great Britain. It is bordered by England to the east, the Irish Sea to the north and west, and the Bristol Channel to the south. It had a population in 2011 of 3,063,456 and has a total area of . Wales has over of coastline and is largely mountainous, with its higher peaks in the north and central areas, including Snowdon, its highest summit. The country lies within the north temperate zone and has a changeable, maritime climate. - Northern Ireland (; Ulster Scots: "") is a top-level constituent unit of the United Kingdom in the northeast of Ireland. It is variously described as a country, province, region, or "part" of the United Kingdom, amongst other terms. Northern Ireland shares a border to the south and west with the Republic of Ireland. In 2011, its population was 1,810,863, constituting about 30% of the island's total population and about 3% of the UK's population. Established by the Northern Ireland Act 1998 as part of the Good Friday Agreement, the Northern Ireland Assembly holds responsibility for a range of devolved policy matters, while other areas are reserved for the British government. Northern Ireland co-operates with the Republic of Ireland in some areas, and the Agreement granted the Republic the ability to "put forward views and proposals" with "determined efforts to resolve disagreements between the two governments". - Carlingford Lough (Ulster Scots: "Carlinford Loch" or "Cairlinfurd Loch") is a glacial fjord or sea inlet that forms part of the border between Northern Ireland to the north and the Republic of Ireland to the south. On its northern shore is County Down and on its southern shore is County Louth. At its extreme interior angle (the northwest corner) it is fed by the Newry River and the Newry Canal. - The Irish Sea (, , , Ulster-Scots: "Airish Sea"), separates the islands of Ireland and Great Britain. It is connected to the Celtic Sea in the south by St George's Channel, and to the Inner Seas off the West Coast of Scotland in the north by the North Channel. Anglesey is the largest island within the Irish Sea, followed by the Isle of Man. The sea is occasionally, but rarely, referred to as the Manx Sea. - Dundalk is the county town of County Louth, Ireland. It is on the Castletown River, which flows into Dundalk Bay, and is near the border with Northern Ireland, halfway between Dublin and Belfast. Its has associations with the mythical warrior hero Cu Chulainn. - Cu Chulainn, also spelt Cu Chulaind or Cuchulainn (Irish for "Culann's Hound") and sometimes known in English as Cuhullin , is an Irish mythological hero who appears in the stories of the Ulster Cycle, as well as in Scottish and Manx folklore. He is believed to be an incarnation of the god Lugh, who is also his father. His mother is the mortal Deichtine, sister of Conchobar mac Nessa. - Newry is a city in Northern Ireland, from Belfast and from Dublin. It had a population of 29,946 in 2011. Newry straddles counties Armagh and Down. - The London and North Western Railway (LNWR, L&NWR) was a British railway company between 1846 and 1922. In the late 19th century the L&NWR was the largest joint stock company in the world. - Dublin is the capital and largest city of Ireland. Dublin is in the province of Leinster on Ireland's east coast, at the mouth of the River Liffey. The city has an urban area population of 1,345,402. The population of the Greater Dublin Area, , was 1,904,806 people. - Greenore is a small town, townland and deep water port on Carlingford Lough in County Louth, Ireland. The population of Greenore and the surrounding rural area (electoral area) was 898 in the 2002 Irish census. - A County town is usually the location of administrative or judicial functions within the county, or it has been established over time as the "de facto" main town of a county. The concept of a county town eventually became detached from its original meaning of where the county administration or county hall is based. In fact, many county towns are no longer part of the administrative county. For example, Nottingham is administered by a unitary authority entirely separate from the rest of Nottinghamshire. Many county towns are classified as cities, but all are referred to as county towns regardless of whether city status is held or not. - The Castletown River is a river which flows through the town of Dundalk, County Louth, Ireland. It rises near Newtownhamilton, County Armagh, Northern Ireland, and is known as the Creggan River in its upper reaches. Its two main tributaries are the Kilcurry and Falmore rivers and it enters the Irish Sea at Dundalk Bay on the east coast of Ireland. The Castletown River flows in at the northwest corner of Dundalk Bay creating a deep channel through the intertidal zone. It is routinely dredged for navigation purposes for the deep water port of Dundalk. - Ireland (Ulster-Scots: ) is an island in the North Atlantic. It is separated from Great Britain to its east by the North Channel, the Irish Sea, and St George's Channel. Ireland is the second-largest island of the British Isles, the third-largest in Europe, and the twentieth-largest on Earth. Given the information, choose the subject and object entities that have the relation of 'instance of'.
The answer to this question is:
dundalk , railway company