With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Streptococcus belongs to a phylum.
text_B: Streptococcus is a genus of coccus -LRB- spherical -RRB- Gram-positive bacteria belonging to the phylum Firmicutes and the order Lactobacillales -LRB- lactic acid bacteria -RRB- .. Firmicutes. Firmicutes. Lactobacillales. Lactobacillales. genus. genus. coccus. coccus. Gram-positive bacteria. Gram-positive bacteria. Cell division in this genus occurs along a single axis in these bacteria , thus they grow in chains or pairs , hence the name -- from Greek στρεπτος streptos , meaning easily bent or twisted , like a chain -LRB- twisted chain -RRB- .. genus. genus. Cell division. Cell division. axis. coordinate system. Greek. Greek language. -LRB- Contrast this with staphylococci , which divide along multiple axes and generate grape-like clusters of cells . -RRB-. staphylococci. Staphylococcus. cells. cell ( biology ). Most are oxidase-negative and catalase-negative , and many are facultative anaerobes .. oxidase-negative. oxidase test. catalase. catalase. facultative anaerobes. facultative anaerobic organism. In 1984 , many bacteria formerly considered Streptococcus were separated out into the genera Enterococcus and Lactococcus .. genera. Genus. Enterococcus. Enterococcus. Lactococcus. Lactococcus. Currently , over 50 species are recognised in this genus .. genus. genus. This genus has been found to be part of the salivary microbiome .. genus. genus. salivary microbiome. salivary microbiome
related.