With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Bradford is only a town.
text_B: Caspase 12 is a protein that belongs to a family of enzymes called caspases which cleave their substrates at C-terminal aspartic acid residues .. protein. protein. C-terminal. C-terminal. aspartic acid. aspartic acid. It is closely related to caspase 1 and other members of the caspase family , known as inflammatory caspases , which process and activate inflammatory cytokines such as interleukin 1 and interleukin 18 .. caspase. caspase. caspase 1. caspase 1. interleukin 1. interleukin 1. interleukin 18. interleukin 18
not_related.