With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Phantoms is an American movie.
text_B: Jan Raphael Høegh-Krohn -LRB- 10 February 1938 -- 24 January 1988 -RRB- was a Norwegian mathematician .. Norwegian. Norwegian people. mathematician. mathematician. He finished his Ph.D. in 1966 entitled On Partly Gentle Perturbation with Application to Perturbation by Annihilation-Creation Operator under the supervision of Kurt Friedrichs at the New York University .. Ph.D. Ph.D. New York University. New York University. Kurt Friedrichs. Kurt Friedrichs. He has authored over 150 papers and is known for the discovery of a fundamental duality in relativistic quantum statistical mechanics by representing the basic correlation functions in terms of a certain. quantum statistical mechanics. quantum statistical mechanics. stochastic process , now known as the Høegh-Krohn process .
not_related.