With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Empress Ki has the titular Empress Gi.
text_B: Methanocaldococcus sp .. Methanocaldococcus. Methanocaldococcus. FS406-22 is an archaea in the genus Methanocaldococcus .. Methanocaldococcus. Methanocaldococcus. archaea. archaea. It is an anaerobic , piezophilic , diazotrophic , hyperthermophilic marine archaeon .. anaerobic. Anaerobic respiration. piezophilic. Piezophile. hyperthermophilic. Hyperthermophile. archaeon. Archaea. This strain is notable for fixing nitrogen at the highest known temperature of nitrogen fixers recorded to date .. The 16S rRNA gene of Methanocaldococcus sp .. Methanocaldococcus. Methanocaldococcus. 16S rRNA. 16S ribosomal RNA. FS406-22 , is almost 100 % similar to that of Methanocaldococcus jannaschii , a non-nitrogen fixer .. Methanocaldococcus. Methanocaldococcus. Methanocaldococcus jannaschii. Methanocaldococcus jannaschii
not_related.