With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: San Francisco is in Central California.
text_B: Christchurch is a borough and town in the county of Dorset on the English Channel coast , adjoining Bournemouth in the west , with the New Forest to the east .. Christchurch. Christchurch, Dorset. borough. borough. town. town. Dorset. Dorset. English Channel. English Channel. Bournemouth. Bournemouth. New Forest. New Forest. Historically in Hampshire , it joined Dorset with the reorganisation of local government in 1974 and is the most easterly borough in the county .. borough. borough. Dorset. Dorset. Hampshire. Hampshire. reorganisation of local government in 1974. Local Government Act 1972. The town has existed since 650 AD and its close proximity to the Cotentin Peninsula made it an important trading port and a potential target for invasion during the Napoleonic and Second World Wars .. town. town. Cotentin Peninsula. Cotentin Peninsula. Napoleonic. Napoleonic Wars. Second World. Second World War. Situated at the lowest crossing points of the Avon and Stour , it was originally known as Twynham , from `` tweon eam '' , meaning -LRB- the settlement -RRB- between two rivers .. Avon. Hampshire Avon. Stour. River Stour, Dorset. It was not until the construction of the priory in 1094 that the town became known as Christchurch .. Christchurch. Christchurch, Dorset. town. town. In Saxon times the harbour was one of the most important in England and the town became both a Royal manor and a burgh .. town. town. Saxon. Saxon. During its turbulent history , the town has witnessed battles between Saxons , when Aethelwold stormed the ramparts ; between Royalists and Parliamentarians during the civil war , and between smugglers and excise men during the 18th century .. town. town. Aethelwold. Æthelwold of Wessex. Royalists. Cavaliers. Parliamentarians. Roundheads. smugglers. smugglers. excise men. HM Customs and Excise. Today the town is a popular tourist destination , with one-and-a-half-million annual visitors .. town. town
not_related.