With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Borrelia afzelii belongs to the phylum of spirochete.
text_B: Borrelia is a genus of bacteria of the spirochete phylum .. genus. genus. bacteria. bacteria. spirochete. spirochete. It causes borreliosis , a zoonotic , vector-borne disease transmitted primarily by ticks and by lice , depending on the species .. borreliosis. borreliosis. zoonotic. zoonotic. vector-borne disease. Vector ( epidemiology ). ticks. ticks. lice. lice. The genus is named after the French biologist Amedee Borrel -LRB- 1867 -- 1936 -RRB- .. genus. genus. Amedee Borrel. Amedee Borrel. There are 52 known species of Borrelia .. 21 are members of the Lyme disease group , 29 belong to the relapsing fever group , and two are members of a third group .
related.