1540
Xinhua News Agency , Zhengzhou , April 18 , by wire ( reporters Xianwen Guo and Geng Wang
 Xinhua News Agency, Zhengzhou, April 18, Xianwen Guo, Geng Wang
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:
 Xinhua News Agency, Zhengzhou, April 18, Xianwen Guo, Geng Wang