With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Elementary was created by a man.
text_B: Johann Abraham Ihle -LRB- June 14 , 1627 -- c. 1699 -RRB- was a German amateur astronomer who discovered the first known globular cluster , M22 , on August 26 , 1665 while observing Saturn in Sagittarius .. German. Germans. amateur astronomer. amateur astronomy. globular cluster. globular cluster. M22. Messier 22
not_related.