With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Narendra Modi was not the Chief Minister of Gujarat from 2001 to 2014.
text_B: An operculum is a small covering or lid , and is widely used in descriptions of animals and plants .. Operculum may refer to  :. In human biology  :. Cervical mucus plug , the cervical mucus plug that blocks the cervix of the uterus after conception. Cervical mucus plug. Cervical mucus plug. Operculum -LRB- brain -RRB- , the part of the brain covering the insula. Operculum -LRB- dentistry -RRB- , a small flap of tissue which may cover an erupting or partially erupted molar. In animal biology  :. Operculum -LRB- animal -RRB- , a structure resembling a lid or a small door that opens and closes. Operculum -LRB- fish -RRB- , a flap covering the gills of bony fish. Operculum -LRB- gastropod -RRB- , a sort of trapdoor used to close the aperture of some snails. Operculum -LRB- bird -RRB- , a structure which covers the nares of some birds. Operculum -LRB- bryozoa -RRB- , a lid on the orifice of some bryozoans. Operculum , the anterior end of a fruit fly puparium , through which the adult fly emerges. fruit fly. Vidalia ( fruit fly ). puparium. puparium. In botany  :. Operculum -LRB- botany -RRB- , various lids and flaps pertaining to plants , algae and fungi
not_related.