With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: There is a song called California Gurls.
text_B: Bhrigu Nath Singh , also known as B.N. Singh , is an Indian engineering scientist .. He is a distinguished professor and Institute 's first Dean of Human Resources , Indian Institute of Technology Kharagpur .. Indian Institute of Technology Kharagpur. Indian Institute of Technology Kharagpur. Presently , he is also Chair of the ICTACEM and was a former Head of Department Aerospace Engineering , IIT Kharagpur .. ICTACEM. ICTACEM. Aerospace Engineering. Aerospace Engineering. He has discovered the enormous impact of material uncertainty on Aerospace structures response , vibratory loads and stability .. Aerospace structures. Structural Engineering. His recently developed three novel shear deformation theories AIAA Journal , 2013 , which is a pioneer work in this field .. AIAA Journal. AIAA Journal. He is one of the delegates of Aerospace Industry-Academia Conclave , HAL and also had adorned for taking Lead in Establishing First Aerospace University in India .. India. India. HAL. Hindustan Aeronautics. Singh is best known for his pioneering research and works in Smart and Composite Structures , Uncertainty Quantification in Aircraft Analysis & Design , Multi-scale Modelling , FGM Plates and Shells , Adaptive Nonlinear FEM , Aerospace Structures and Solid Mechanics .
not_related.