With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Beijing is rarely the second largest Chinese city.
text_B: Michael Ray Renfro -LRB- born June 19 , 1955 -RRB- is a former American professional football player in the National Football League for the Houston Oilers and Dallas Cowboys .. Houston Oilers. Houston Oilers. Dallas Cowboys. Dallas Cowboys. football. American football. National Football League. National Football League. He played college football at Texas Christian University .. football. American football. college football. college football. Texas Christian University. Texas Christian University
not_related.