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In the past two years , more than 50 new breeds such as melons , vegetables , flowers and fruit trees , etc. have successively been introduced from countries such as US and Japan , etc. and has bred 3.5 million improved nurseries .
 date: the past two years; cardinal: more than 50; geographical social political: US; geographical social political: Japan; cardinal: 3.5 million
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 past two years; cardinal: more than 50; geographical social political: US; geographical social political: Japan; cardinal: 3.5 million