With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Douglas Aircraft Company and McDonnell Aircraft are part of the history of McDonnell Douglas.
text_B: Frederick William III -LRB- Friedrich Wilhelm III -RRB- -LRB- 3 August 1770 -- 7 June 1840 -RRB- was king of Prussia from 1797 to 1840 .. Prussia. Kingdom of Prussia. He ruled Prussia during the difficult times of the Napoleonic Wars and the end of the Holy Roman Empire .. Prussia. Kingdom of Prussia. Napoleonic Wars. Napoleonic Wars. Holy Roman Empire. Holy Roman Empire. Steering a careful course between France and her enemies , after a major military defeat in 1806 , he eventually and reluctantly joined the coalition against Napoleon in the Befreiungskriege .. Befreiungskriege. German Campaign of 1813. Following Napoleon 's defeat he was King of Prussia during the Congress of Vienna which assembled to settle the political questions arising from the new , post-Napoleonic order in Europe .. King of Prussia. King of Prussia. Prussia. Kingdom of Prussia. Congress of Vienna. Congress of Vienna. He was determined to unify the Protestant churches , to homogenize their liturgy , their organization and even their architecture .. The long-term goal was to have fully centralized royal control of all the Protestant churches in the Prussian Union of churches .. Prussian Union of churches. Prussian Union of churches
not_related.