20557
Negotiations were proposed in late March , and on 2 April a new Prime Minister of Zaire , Étienne Tshisekedi - a longtime rival of Mobutu - was installed .
 Zaire, Étienne Tshisekedi, Mobutu
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Zaire, Étienne Tshisekedi, Mobutu