With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Bangalore was captured subsequent to the Fourth Anglo-Mysore War.
text_B: In the mathematical field of topology , a development is a countable collection of open covers of a topological space that satisfies certain separation axioms .. mathematical. mathematical. topology. topology. countable. countable. topological space. topological space. Let be a topological space .. topological space. topological space. A development for is a countable collection of open coverings of , such that for any closed subset and any point in the complement of , there exists a cover such that no element of which contains intersects .. countable. countable. complement. Complement ( set theory ). A space with a development is called developable .. A development such that for all is called a nested development .. A theorem from Vickery states that every developable space in fact has a nested development .. If is a refinement of , for all , then the development is called a refined development .. refinement. refinement ( topology ). Vickery 's theorem implies that a topological space is a Moore space if and only if it is regular and developable .. topological space. topological space. Moore space. Moore space ( topology ). regular. regular space
not_related.