84180
The biggest challenges to this were Britain 's withdrawal into so-called splendid isolation , the decline of the Ottoman Empire and the post-1848 rise of Prussia under Otto von Bismarck .
 Britain, Ottoman Empire, Prussia, Otto von Bismarck
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Britain, Ottoman Empire, Prussia, Otto von Bismarck