With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Liberia declared its independence on July 26, 1847.
text_B: The Benz Patent-Motorwagen -LRB- `` patent motorcar '' -RRB- , built in 1885 , is widely regarded as the world 's first automobile , that is , a vehicle designed to be propelled by an internal combustion engine .. patent. patent. The original cost of the vehicle in 1885 was 600 imperial German marks , approximately 150 US dollars .. imperial German marks. German gold mark. The vehicle was awarded the German patent number 37435 , for which Karl Benz applied on January 29 , 1886 .. patent. patent. Karl Benz. Karl Benz. Following official procedures , the date of the application became the patent date for the invention once the patent was granted , which occurred in November of that year .. patent. patent. Benz 's wife , Bertha , financed the development process .. Bertha. Bertha Benz. According to modern law , she would have therefore received the patent rights , but married women were not allowed to apply for patents at the time .. patent. patent. Benz unveiled his invention to the public on July 3 , 1886 , on the Ringstrasse in Mannheim .. Mannheim. Mannheim. About 25 Patent-Motorwagens were built between 1886 and 1893 .
not_related.