159703
The option is valued as follows : Application As above , these methods can solve derivative pricing problems that have , in general , the same level of complexity as those problems solved by tree approaches , but , given their relative complexity , are usually employed only when other approaches are inappropriate .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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