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In the last two years , he has led the task force to conduct many field interviews and investigations on left - behind children in numerous rural areas in central and western China , including Shaanxi , Ningxia , Hebei , and Beijing .
 date: the last two years; geographical social political: China; geographical social political: Shaanxi; geographical social political: Ningxia; geographical social political: Hebei; geographical social political: Beijing
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:
 date: the last two years; geographical social political: China; geographical social political: Shaanxi; geographical social political: Ningxia; geographical social political: Hebei; geographical social political: Beijing