With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Radiohead released their debut single in 1992.
text_B: The name paravector is used for the sum of a scalar and a vector in any Clifford algebra -LRB- Clifford algebra is also known as geometric algebra in the physics community . -RRB-. Clifford algebra. Clifford algebra. geometric algebra. geometric algebra. This name was given by J. G. Maks , Doctoral Dissertation , Technische Universiteit Delft -LRB- Netherlands -RRB- , 1989 .. The complete algebra of paravectors along with corresponding higher grade generalizations , all in the context of the Euclidean space of three dimensions , is an alternative approach to the spacetime algebra -LRB- STA -RRB- introduced by David Hestenes .. spacetime algebra. spacetime algebra. David Hestenes. David Hestenes. This alternative algebra is called algebra of physical space -LRB- APS -RRB- .. algebra of physical space. algebra of physical space
not_related.