50356
In the meantime , during the rule of Todor Zhivkov , a significant military-industrial complex was established , capable of producing armored vehicles , self-propelled artillery , small arms and ammunition , as well as aircraft engines and spare parts .
 Todor Zhivkov
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 Todor Zhivkov