With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Charlemagne was crowned by Pope Leo III.
text_B: Alain Menargues -LRB- born 1947 -RRB- is a French journalist , and former director of Radio France Internationale -LRB- RFI -RRB- .. Radio France Internationale. Radio France Internationale
not_related.