With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Game of Thrones' (season 1) cast included Michelle Fairley as Catelyn Stark.
text_B: Macrelaps -LRB- or Natal black snake -RRB- is a monotypic genus created for the rear-fanged -LRB- opisthoglyphous -RRB- venomous snake species , M. microlepidotus , endemic to South Africa .. Natal. Natal, South Africa. monotypic. monotypic. genus. genus. venomous snake. venomous snake. species. species. endemic. Endemism. South Africa. South Africa. No subspecies are currently recognized .. subspecies. subspecies
not_related.