21535
Economists say that this plan will help our stock markets , and since half of American families own stock , the reform will help them save and help our economy grow .
 half, American
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:
 half, American