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Nixon concluded five days of private talks with Chinese leaders in Beijing , but apparently failed to ease strains in Sino - U.S. ties caused by China 's crackdown against pro-democracy protesters in June .
 person: Nixon; date: five days; national religious political: Chinese; geographical social political: Beijing; national religious political: Sino; geographical social political: China; date: June
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: 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:
 person: Nixon; date: five days; national religious political: Chinese; geographical social political: Beijing; national religious political: Sino; geographical social political: China; date: June