With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: The Nilotic languages are spoken by an indigenous people in Northeastern Africa.
text_B: Ron Lee was a professional American football player who played running back for four seasons for the Baltimore Colts .. Baltimore Colts. History of the Baltimore Colts. American football. American football. running back. running back
not_related.