With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: There are different economies of spiders.
text_B: RAF Ludford Magna was a Royal Air Force airfield operated by Bomber Command during the Second World War and the Cold War .. Ludford. Ludford, Lincolnshire. Cold War. Cold War. Bomber Command. RAF Bomber Command. Second World War. Second World War. The station lay on agricultural farmland immediately south of the village of Ludford , Lincolnshire and was sited 21.4 miles -LRB- 34.4 km -RRB- north east of the county town of Lincoln , Lincolnshire , England .. Ludford. Ludford, Lincolnshire. Lincolnshire. Lincolnshire. England. England. Lincoln. Lincoln, England. The remains of the station can be seen from the B1225 Caistor High Street , and the long distance footpath the Viking Way passes right next to the eastern perimeter track .. Viking Way. Viking Way. Used for Avro Lancaster bomber operations in the latter part of the Second World War the station was placed on care and maintenance until the mid-1950s when it was reactivated as a Cold War base for Thor intermediate range ballistic nuclear missiles -LRB- IRBMs -RRB- .. Cold War. Cold War. Second World War. Second World War. Avro Lancaster. Avro Lancaster. The station closed in the early part of the 1960s and has been mostly dismantled and returned to agricultural uses
not_related.