With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Artificial intelligence is unrelated to Bertrand Russell's work.
text_B: For the preserved railway see Waverley Route Heritage Association. Waverley Route Heritage Association. Waverley Route Heritage Association. Waverley Route. Waverley Route. The Border Union Railway was a railway line which connected places in the south of Scotland and Cumberland in England .. Scotland. Scotland. Cumberland. Cumbria. It was authorised on 21 July 1859 and advertised as the Waverley Route by the promoters - the North British Railway .. Waverley Route. Waverley Route. North British Railway. North British Railway. It connected the Edinburgh and Hawick Railway at with .. Edinburgh and Hawick Railway. Edinburgh and Hawick Railway
not_related.