37584
26 ROCAF pilots successfully completed U-2 training in the US and flew 220 operational missions , including 102 surveillance flights over the People 's Republic of China .
 ROCAF, People 's Republic of China
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 ROCAF, People 's Republic of China