Question: How many years old is the stone circle near Penrith in Cumbria?

Context paragraphs:
Withypool Stone Circle: Withypool Stone Circle, also known as Withypool Hill Stone Circle, is a stone circle located near to the village of Withypool in the south-western English county of Somerset.  It is found within Exmoor.  The Withypool ring is part of a tradition of stone circle construction that spread throughout much of Britain, Ireland, and Brittany during the Late Neolithic and Early Bronze Age, over a period between 3,300 and 900 BCE.  The purpose of such monuments is unknown, although archaeologists speculate that they were likely religious sites, with the stones perhaps having supernatural associations for those who built the circles.

Yellowmead stone circle: Yellowmead stone circle near Sheepstor in Devon, England, is a Bronze Age concentric stone circle consisting of four rings of stones set within one another.  The largest is 20 metres wide and the smallest, 6 metres.  It is located on Yellowmead Down.

Boskednan stone circle: Boskednan stone circle (grid reference [ SW434351] ) is a partially restored prehistoric stone circle near Boskednan, around 4 miles (6 kilometres) northwest of the town of Penzance in Cornwall, England, United Kingdom.  The megalithic monument is traditionally known as the Nine Maidens or Nine Stones of Boskednan, although the original structure may have contained as many as 22 upright stones around its 69-metre perimeter.

Grey Croft stone circle: Grey Croft stone circle is a restored stone circle near Seascale in Cumbria, England (grid reference [ NY03340238] ).  It is situated near the site of the former nuclear-power stations at Sellafield.

Nine Stones, Winterbourne Abbas: The Nine Stones, also known as the Devil's Nine Stones, the Nine Ladies, or Lady Williams and her Dog, is a stone circle near the village of Winterbourne Abbas in the south-western English county of Dorset.  Archaeologists believe that it was likely erected during the Bronze Age.  The Nine Stones is part of a tradition of stone circle construction that spread through much of Britain, Ireland, and Brittany during the Late Neolithic and Early Bronze Age between 3,300 and 900 BCE.  The purpose of such monuments is unknown, although archaeologists speculate that they were likely religious sites, with the stones perhaps having supernatural associations for those who built the circles.

Duloe stone circle: Duloe stone circle or Duloe circle is a stone circle near the village of Duloe, located 5 mi from Looe in southeast Cornwall, England, UK.

Melmerby, Cumbria: Melmerby is a village in Cumbria, England.  It is a small village with a population of around 200.  The village is 9 miles to the east of Penrith, a thriving community with immediate access to Junction 40 of the M6 motorway and a main line railway station serving London, Manchester, Edinburgh and Glasgow.  Melmerby is a quiet backwater with excellent links to other parts of the UK.  Surrounded by beautiful countryside it sits between the North Pennines with its highest point, Cross Fell to the east and the World Heritage Lake District National Park 10 miles to the west.  It is relatively quiet because the area is not as popular with tourists as other parts of Cumbria.  It has ample facilities to support visitors who choose to travel outside the Lake District National Park which can sometimes become congested in high season.  The River Eden is bridged about 4 mi away at Langwathby, and Long Meg and Her Daughters, the 3,500-year-old stone circle—the second largest in the country—is nearby at Little Salkeld.

Uragh Stone Circle: The Uragh Stone Circle is a neolithic stone circle near Gleninchaquin Park, Tuosist, County Kerry, Ireland.

Scorhill: Scorhill (pronounced "Scorill") Stone Circle is now the commonly known name for Gidleigh Stone Circle or Steep Hill Stone Circle, one of Devon's biggest and most intact stone circles, situated on Gidleigh Common near the village of Gidleigh in the north east of Dartmoor, in the United Kingdom.  It is an English Heritage scheduled monument and has been described as Devon's finest stone circle.

Long Meg and Her Daughters: Long Meg and Her Daughters is a Bronze Age stone circle near Penrith in Cumbria, North West England.  One of around 1,300 stone circles in the British Isles and Brittany, it was constructed as a part of a megalithic tradition that lasted from 3,300 to 900 BCE, during the Late Neolithic and Early Bronze Age.  The stone circle is the sixth-biggest example known from this part of north-western Europe, being slightly smaller than the rings at Stanton Drew in Somerset, the Ring of Brodgar in Orkney and Newgrange in County Meath.

Supporting paragraphs: Melmerby, Cumbria Long Meg and Her Daughters
Answer: 3,500-year-old