Question: What is the green that centres the village where Greystoke Castle is located, surrounded by?

full_context: Document 1: Green Quarter Fell: Green Quarter Fell is an upland area in the east of the English Lake District, near Kentmere village, Cumbria. It is the subject of a chapter of Wainwright's book "The Outlying Fells of Lakeland". Wainwright's walk is an anticlockwise circuit from Kentmere, reaching the summit of Hollow Moor at 1394 ft and a nameless summit at 1370 ft and making a detour to admire the tarn of Skeggles Water. He says that the walk offers: ""... a perfectly-balanced and lovely view of upper Kentmere ... that cries aloud for a camera.""
Document 2: Crayke Castle: Crayke Castle is a grade I listed 15th-century castle in Crayke, North Yorkshire, England. The castle consists of a restored 15th century four storey tower house with attached outbuildings to the rear and a separate ruined 15th tower, the "New Tower". It is situated on Church Hill in the village of Crayke.
Document 3: Greysteel: Greysteel or Gresteel is a village in County Londonderry, Northern Ireland. It lies 9 mi to the east of Derry and 7 mi to the west of Limavady on the main A2 coast road between Limavady and Derry, overlooking Lough Foyle. It is designated as a Large Village and in the 2001 Census it had a population of 1,229 people, an increase of almost 20% compared to 1991. It is situated within Causeway Coast and Glens district.
Document 4: Greencastle, County Down: Greencastle is a castle in County Down, Northern Ireland. It is a royal castle built in the 13th century. While it dates mainly from the 13th century, it had substantial 15th- and 16th-century alterations. The large rectangular keep with three vaulted chambers at the ground floor is approached across a rock-cut ditch. It was originally surrounded by outer rectangular walls with four corner towers (ruins of some remain). It is likely to have been built by Hugh de Lacy, along with Carlingford Castle on the opposite side of Carlingford Lough, to guard the narrow entry channel to the Lough, and the ferry crossing between the two.
Document 5: Castle of Mey: The Castle of Mey (formerly Barrogill Castle) is located in Caithness, on the north coast of Scotland, about 6 mi west of John o' Groats. In fine weather there are views from the castle north to the Orkney Islands.
Document 6: Carlisle Castle: Carlisle Castle is situated in Carlisle, in the English county of Cumbria, near the ruins of Hadrian's Wall. The castle is over 900 years old and has been the scene of many historical episodes in British history. Given the proximity of Carlisle to the border between England and Scotland, it has been the centre of many wars and invasions. Today the castle is managed by English Heritage and is open to the public. The castle until recently was the administrative headquarters of the former King's Own Royal Border Regiment now county headquarters to the Duke of Lancaster's Regiment and a museum to the regiment is within the castle walls.
Document 7: Greystoke, Cumbria: Greystoke is a village and civil parish on the edge of the Lake District National Park in Cumbria, England, about 4 mi west of Penrith. The village centres on a green surrounded by stone houses and cottages.
Document 8: Haverthwaite: Haverthwaite is a small village and civil parish in the Furness region of Cumbria. It is also within the boundaries of the Lake District National Park. It is located several miles east of Ulverston and is near the southern end of Windermere. The village gets part of its name from the Old Norse word "thwaite" which usually refers to a clearing or settlement in the forest.
Document 9: Elvaston, Derbyshire: Elvaston is a small village and civil parish in Derbyshire, England. The parish also includes two hamlets, Ambaston and Thulston, and a modern housing estate, Boulton Moor. The population of the civil parish taken at the 2011 Census was 1,801. Located to the south-east of Derby, Elvaston itself is dominated by Elvaston Castle, a country house which is currently in the ownership of Derbyshire County Council, who plan to lease the site to a private company. The move has proved controversial, attracting a petition of 60,000 signatures against the proposals collected by the Elvaston Castle Estate Trust, who want to keep the site in public ownership. At the present time the Castle is rarely open to the public and has been somewhat neglected, while the grounds are open throughout the summer.
Document 10: Blindcrake: Blindcrake is a village and civil parish within the Isel Valley, in the Lake District National Park and in the Allerdale district of Cumbria, England. According to the 2001 census it had a population of 287, increasing to 348 at the 2011 Census. The parish includes Blindcrake village and the hamlets of Redmain, Isel and Sunderland, The whole parish lies within the Lake District National Park and, since 2001, Blindcrake village  is one of 23 designated conservation areas of the National Park Planning Authority. This status is largely based on its mediaeval strip field pattern which is described as "undoubtedly the finest example of its type in the Lake District". The parish boundary is approximately defined by the Lake District National Park boundary in the north and west, by a line 2 km to the west of the A591 in the east and by the River Derwent in the south. It is one of the smallest parishes within the Allerdale district of Cumbria. The parish has a website providing local information and lists of events.
Document 11: Crookston Castle: Crookston Castle is located in the Pollok area of south-west Glasgow, Scotland. The castle is located some 5 miles (8 km) south-west of the city centre, and 3 miles (5 km) east of Paisley, overlooking the Levern Water, just before its confluence with the White Cart Water.
Document 12: Greystoke Castle: Greystoke Castle is in the village of Greystoke 8 km west of Penrith in the county of Cumbria in northern England. (grid reference [ NY435309] ).
Document 13: Grey Crag: Grey Crag is a fell in the English Lake District. It stands to the east of Longsleddale in the Far Eastern Fells. There is another fell named Gray Crag in the Lake District near Hartsop.
Document 14: Crosby Villa: Crosby Villa is a village in the civil parish of Crosscanonby in Cumbria, United Kingdom. It is located on the A596 road, roughly three-and-three-quarter miles north-east of Maryport and a similar distance south-west of Aspatria. The village of Crosby is one-and-a-half miles to the south-west, and the hamlet of Oughterside is two-and-a-quarter miles to the north-east. Cumbria's county town, Carlisle, is twenty-four miles to the north-east. Crosby Villa lies on the Solway Plain, less than one mile from the boundary of the Solway Coast Area of Outstanding Natural Beauty, and approximately one-and-a-half miles from the shore of Allonby Bay, an inlet of the Solway Firth. Historically, the name may have been spelled Crosby Villas.
Document 15: Grisedale Pike: Grisedale Pike is a fell in the Lake District, Cumbria, England situated 4.5 mi west of the town of Keswick in the north-western sector of the national park. At a height of 791 m (2593 feet) it is the 40th-highest Wainwright in the Lake District; it also qualifies as a Hewitt, Marilyn and Nuttall. Grisedale Pike presents a striking appearance when viewed from the east, particularly from the vicinity of Keswick. It possesses two subsidiary summits: one unnamed (usually referred to as 'subsidiary summit', situated above Hobcarton Crag); the other Hobcarton End.
ground_truth: stone houses and cottages.