With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Ronald Reagan had Alzheimer's disease.
text_B: Crug Eryr Castle -LRB- Castell Crug Eryr -RRB- was a motte and bailey-style castle located atop a hill adjacent to the A44 about 2 miles northwest of Llanfihangel Nant Melan , near New Radnor in Powys , Wales .. motte and bailey. motte and bailey. A44. A44 road. Llanfihangel Nant Melan. Llanfihangel Nant Melan. New Radnor. New Radnor. Powys. Powys. Wales. Wales. Cryg Eryr , which means `` the eagle 's mount , '' was likely situated to block the mountain pass into Maelienydd .. Maelienydd. Maelienydd. The castle 's exact origins are unclear , though some scholars believe it belonged to the princes of Maelienydd , considering that Maelgwn ap Cadwallon , ` Prince of Melenia ' -LRB- i.e. Maelienydd -RRB- son of Cadwallon ap Madog , received the Archbishop of Canterbury at Crug Eryr Castle in March 1188 .. Maelienydd. Maelienydd. Cadwallon ap Madog. Cadwallon ap Madog. Archbishop of Canterbury. Archbishop of Canterbury. This occasion was an early stop on the Tour of Wales during which the Archbishop was accompanied by Gerald of Wales .. Wales. Wales. Gerald of Wales. Gerald of Wales. This tour was intended as a recruiting campaign of the Third Crusade .. Third Crusade. Third Crusade. The later bard known as Llywelyn Crug Eryr took his epithet ` Crug Eryr ' , having lived at the castle at one time .. Llywelyn Crug Eryr. Llywelyn Crug Eryr
not_related.