With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Billy Bob Thornton directed the 2001 film Jayne Mansfield's Car.
text_B: The Nikon 1-mount is a type of interchangeable lens mount developed by Nikon for its Nikon CX format mirrorless interchangeable-lens cameras .. Nikon CX format. Nikon CX format. lens mount. lens mount. Nikon. Nikon. mirrorless interchangeable-lens. mirrorless interchangeable-lens camera. The 1-mount was first introduced on the Nikon 1 series in 2011 , and features a bayonet mount .. Nikon 1 series. Nikon 1 series. Nikon. Nikon. bayonet mount. bayonet mount
not_related.