With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Rafael Nadal has won singles titles.
text_B: The BR postcode area , also known as the Bromley postcode area , is a group of eight postcode districts in England which are subdivisions of seven post towns .. England. England. These postcode districts cover part of south-eastern Greater London , as well as a small part of north-west Kent .. Greater London. Greater London. Kent. Kent. The main sorting office is in Bromley and the area served includes much of the London Borough of Bromley , as well as small parts of the London Borough of Lewisham , the Royal Borough of Greenwich and the London Borough of Croydon .. sorting office. sorting office. London Borough of Bromley. London Borough of Bromley. London Borough of Lewisham. London Borough of Lewisham. Royal Borough of Greenwich. Royal Borough of Greenwich. London Borough of Croydon. London Borough of Croydon. Most of BR8 and a small part of BR6 cover the northwestern part of the Kent district of Sevenoaks , while BR8 also covers the hamlet of Clement Street in the Borough of Dartford .. Kent. Kent. Sevenoaks. Sevenoaks ( district ). Borough of Dartford. Borough of Dartford. TOC
not_related.