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For example , 66 % of the 18 to 24 year olds in the four latest surveys favored an `` open housing '' law prohibiting homeowners from refusing on racial grounds to sell to prospective buyers .
 66 %, the 18 to 24 year olds, four
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:
 66 %, the 18 to 24 year olds, four