With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Burundi has a humid climate.
text_B: Atec , Inc. specializes in the design , manufacture , construction and maintenance of precision components , large fabrications , systems and facilities .. Atec provides solutions for low to medium volume requirements involving engine test , aero support equipment , spaceflight components , and energy service products .. Over 20,000 Atec products have been used by the United States Armed Forces and others , including the Federal Aviation Administration .. United States Armed Forces. United States Armed Forces. Federal Aviation Administration. Federal Aviation Administration. Atec was named NASA Small Business Subcontractor of the Year for 2016 , in recognition of contributions to NASA and Boeing Manned Spaceflight Programs .. NASA. NASA. Boeing. Boeing. Manned Spaceflight Programs. Human spaceflight
not_related.