With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Spencer Tracy died on July 10th, 1967.
text_B: The String Quartet in D major , K. 499 , was written in 1786 in Vienna by Wolfgang Amadeus Mozart .. Vienna. Vienna. Wolfgang Amadeus Mozart. Wolfgang Amadeus Mozart. It was published by -- if not indeed written for -- his friend Franz Anton Hoffmeister .. Franz Anton Hoffmeister. Franz Anton Hoffmeister. Because of this , the quartet has acquired the nickname Hoffmeister .. Hoffmeister had started issuing a series of chamber-music publications in 1785 , including Mozart 's K. 499 as well as Joseph Haydn 's Op. 42 .. Joseph Haydn. Joseph Haydn
not_related.