With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Mammals are invertebrates.
text_B: Steve Kenney -LRB- born December 26 , 1955 in Wilmington , North Carolina -RRB- is a former professional American football player who played guard for seven seasons for the Philadelphia Eagles and the Detroit Lions .. Philadelphia Eagles. Philadelphia Eagles. Detroit Lions. Detroit Lions. American football. American football. guard. Guard ( American football ). Category  :1955 births. Category  : Living people. Category  : American football offensive guards. American football. American football. Category  : Clemson Tigers football players. Category  : Philadelphia Eagles players. Philadelphia Eagles. Philadelphia Eagles. Category  : Detroit Lions players. Detroit Lions. Detroit Lions. Category  : Jesse O. Sanderson High School alumni
not_related.