29035
The President will stay in vietnam for three days , culminating a process of normalizing relations that began early in Mr. Clinton 's first term in office , eight years ago .
 vietnam, three days, Clinton, first, eight years ago
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:
 vietnam, three days, Clinton, first, eight years ago