With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: The Weeknd is a Canadian that sings.
text_B: Palladium-catalyzed coupling reactions comprise a family of cross-coupling reactions that employ palladium complexes as catalysts .. It is an active area of research and applications in homogeneous catalyst .. homogeneous catalyst. homogeneous catalyst. In 2010 , the Nobel Prize in Chemistry was awarded to Richard F. Heck , Ei-ichi Negishi and Akira Suzuki for their work on palladium-catalyzed cross couplings in organic synthesis .. Nobel Prize in Chemistry. Nobel Prize in Chemistry. Richard F. Heck. Richard F. Heck. Ei-ichi Negishi. Ei-ichi Negishi. Akira Suzuki. Akira Suzuki ( chemist )
not_related.