With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Tom Franco is not an only child.
text_B: Cirsosia is a genus of fungi in the Asterinaceae family .. Asterinaceae. Asterinaceae. genus. genus. fungi. fungi. The relationship of this taxon to other taxa within the class is unknown -LRB- incertae sedis -RRB- , and it has not yet been placed with certainty into any order .. taxon. taxon. class. class ( biology ). incertae sedis. incertae sedis. order. order ( biology )
not_related.