143225
Also , if f is an order isomorphism from ( S , \ le_S ) to ( T , \ le_T ) and g is an order isomorphism from ( T , \ le_T ) to ( U , \ le_U ) , then the function composition of f and g is itself an order isomorphism , from ( S , \ le_S ) to ( U , \ le_U ) .
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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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