53509
Thus , the definition of T may cite T , T , or T instead of T ( Hausdorffness ) ; all are equivalent in the context of regular spaces .
 T, T, T, T, Hausdorffness
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 T, T, T, T, Hausdorffness