21578
Manville , a forest and building products concern , has offered to pay the trust $ 500 million for a majority of Manville 's convertible preferred stock .
 Manville, $ 500 million, Manville
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:
 Manville, $ 500 million, Manville