With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: NASA is supporting space station operations.
text_B: Chitala hypselonotus '' is a species of knifefish found in freshwater habitats in Borneo and Sumatra in southeast Asia .. Chitala. Chitala. knifefish. Notopteridae. Borneo. Borneo. Sumatra. Sumatra
not_related.