19094
Peng Li said that in the beginning of September of this year , the United Nations would hold the International Population and Development Congress in Cairo with the theme of " population , continuous economic growth and continuous development " .
 Peng Li, the beginning of September of this year, the United Nations, the International Population and Development Congress, Cairo
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:
 Peng Li, the beginning of September of this year, the United Nations, the International Population and Development Congress, Cairo