2434
But Beijing wants to use the base for the People 's Liberation Army after 1997 , when the territory returns to Chinese sovereignty .
 Beijing, the People 's Liberation Army, 1997, Chinese
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: date, organization, person, geographical social political, national religious political, facility, cardinal, location, work of art, law, event, product, ordinal, percent, time, quantity, money, language 
Text: {0} 
Answer:
 Beijing, the People 's Liberation Army, 1997, Chinese