121873
Dir Operation of 1981 He also participated in a number of important miilitary operations , the most prominent one being the Dir operation which was conducted in the North Western Frontier Province of Pakistan .
 North Western Frontier Province, Pakistan
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 North Western Frontier Province, Pakistan