With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Most of the Russian population live in European Russia.
text_B: Fontainea australis is a rare rainforest plant from eastern Australia .. Australia. Australia. The common name is southern fontainea .. It grows in sub tropical rainforest at low altitudes on basaltic alluvial soils .. Distributed from the Wilsons River -LRB- New South Wales -RRB- to the Tallebudgera Valley in south eastern Queensland .. Tallebudgera Valley. Tallebudgera Creek. Queensland. Queensland
not_related.