73084
Formal statement Let X , Y be both closed ( or both open ) subsets of a topological space A such that A = X \ cup Y , and let B also be a topological space .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities:  
Answer:
 None