5009
Conversely , if \ scriptstyle ( X , \ tau_1 , \ tau_2 ) is a pairwise Stone space , then both \ scriptstyle ( X , \ tau_1 ) and \ scriptstyle ( X , \ tau_2 ) are spectral spaces .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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