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In 1782 Georges-Louis Le Sage developed and presented in Berlin probably the world 's first form of electric telegraphy , using 24 different wires , one for each letter of the alphabet .
 Georges-Louis Le Sage, Berlin
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Georges-Louis Le Sage, Berlin