With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Nick Nolte used to be a model.
text_B: Uamh an Claonaite -LRB- Scottish Gaelic  : Cave of the sloping rock -RRB- is the longest cave in Scotland .. Scottish Gaelic. Scottish Gaelic. It consists of a series of dry passages and a series of at least six sumps which have been dived over the years .. The attempt by members of the Grampian Speleological Group to excavate a nearby sinkhole , Rana Hole , and connect into the final chambers from above achieved its aim in December 2007 .. Grampian Speleological Group. Grampian Speleological Group. The length of the cave is 2.868 km and the vertical range is 110 m.
not_related.