With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: R. Kelly has released 12 albums.
text_B: Series 90 may refer to  :. Express Series 90 , an American homebuilt aircraft design. Express Series 90. Express Series 90. Series 90 -LRB- software platform -RRB- , a platform for mobile phones that uses Symbian OS
not_related.