With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Adherents of Christianity are called Christians.
text_B: ZF Wind Power Antwerpen is a business unit of ZF Friedrichshafen , that designs , manufactures and supplies wind turbine gearboxes .. ZF Friedrichshafen. ZF Friedrichshafen. wind turbine. wind turbine
not_related.