With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Boris Karloff contributed to TV.
text_B: Tier-Scalable Reconnaissance is the term for an approach to deploying and controlling vehicles in multiple areas of interest , such as in the exploration of planets or diverse regions on Earth .. It is not a rigid or fixed paradigm , but is infinitely extensible .. It uses hierarchical levels of oversight called tiers , each tier commanding or controlling the vehicles within the tier beneath it .. The size of each tier can be scaled from one to many vehicles .
not_related.