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General elections were held in Ethiopia between 23 June and 7 July 1973 , to elect all 250 members of the Chamber of Deputies , the lower house of the Ethiopian parliament ( the upper house , the Senate , consisted of 125 senators appointed by the Emperor ) .
 Ethiopia
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Ethiopia