With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: There are fewer than 4 cases of shingles per 1000 immunocompromised individuals per year.
text_B: Friedrich Wilhelm von Leysser -LRB- March 7 , 1731 -- October 10 , 1815 -RRB- ; -LRB- surname sometimes given as Leyser -RRB- was a German botanist who was a native of Magdeburg .. botanist. botanist. Magdeburg. Magdeburg. He served as counsellor -LRB- Kriegsrat and Domanenrat -RRB- to the king of Prussia .. He was the author of Flora Halensis -LRB- Flora of Halle -RRB- -LRB- 1761 -RRB- , and was the first president of Naturforschende Gesellschaft zu Halle .. Halle. Halle, Saxony-Anhalt. The plant genus Leyssera -LRB- Leysera -RRB- from the family Asteraceae is named after him .. Leysera. Leysera. Asteraceae. Asteraceae
not_related.