61063
Much of the production of steel and pig iron takes place in Kremikovtsi and Stomana steel in Pernik , with a third metallurgical base in Debelt .
 Kremikovtsi, Stomana, Pernik, Debelt
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Kremikovtsi, Stomana, Pernik, Debelt