With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Mother Teresa was canonised by NASA.
text_B: Backup validation is the process whereby owners of computer data may examine how their data was backed up in order to understand what their risk of data loss might be .. computer. computer. data. data. data loss. data loss. It also speaks to optimization of such processes , charging for them as well as estimating future requirements , sometimes called capacity planning .
not_related.