With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Qatar is a country.
text_B: Russula brevipes is a species of mushroom commonly known as the short-stemmed russula or the stubby brittlegill .. Russula. Russula. mushroom. mushroom. It is widespread in North America , and was reported from Pakistan in 2006 .. Pakistan. Pakistan. The fungus grows in a mycorrhizal association with trees from several genera , including fir , spruce , Douglas-fir , and hemlock .. fir. fir. spruce. spruce. Douglas-fir. Douglas-fir. hemlock. Tsuga. Fruit bodies are white and large , with convex to funnel-shaped caps measuring 7 -- wide set atop a thick stipe up to 8 cm long .. Fruit bodies. Basidiocarp. caps. pileus ( mycology ). stipe. stipe ( mycology ). The gills on the cap underside are closely spaced and sometimes have a faint bluish tint .. gills. lamella ( mycology ). Spores are roughly spherical , and have a network-like surface dotted with warts .. The mushrooms of Russula brevipes often develop under masses of conifer needles or leaves of broadleaved trees , and fruit from summer to autumn .. Russula. Russula. Forms of the mushroom that develop a bluish band at the top of the stipe are sometimes referred to as variety acrior .. mushroom. mushroom. stipe. stipe ( mycology ). variety. variety ( botany ). Although edible , Russula brevipes mushrooms have a bland or bitter flavor .. Russula. Russula. edible. edible mushroom. They become more palatable once parasitized by the ascomycete fungus Hypomyces lactifluorum , a bright orange mold that covers the fruit body and transforms them into lobster mushrooms .. parasitized. parasitism. ascomycete. ascomycete. Hypomyces lactifluorum. Hypomyces lactifluorum. mold. mold
not_related.