With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Jeffrey Dahmer was a drug offender.
text_B: The Burgbach Waterfall -LRB- Burgbachwasserfall -RRB- in the vicinity of Bad Rippoldsau-Schapbach in the Black Forest has a drop of 15 metres and a total height of 32 metres making it one of the highest free falling waterfalls in Germany .. Bad Rippoldsau-Schapbach. Bad Rippoldsau-Schapbach. Black Forest. Black Forest. Its rock shelf is made of hard , silicified sandstones of the Upper Rotliegendes -LRB- Permian -RRB- , which lie over less weather-resistant granites that are easy to carve out .. silicified. silicified. Rotliegendes. Rotliegendes. Permian. Permian ( geology ). The waterfall ist classified as a geological natural monument .. waterfall. waterfall. natural monument. natural monument. The Burgbach flows steeply downhill to the River Wolf .. Wolf. Wolf ( river )
not_related.