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American forces , unable to repulse North Korean armor , soon found themselves in an intense urban fight as columns of North Korean troops , spearheaded by T-34 tanks , entered the town from two directions , cutting off U.S. forces .
 Korean, Korean
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Korean, Korean