With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Eugenio Canfari played guitar.
text_B: Air Chief Marshal Sir David George Evans , -LRB- born 14 July 1924 -RRB- is a retired senior commander of the Royal Air Force .. Royal Air Force. Royal Air Force. Air Chief Marshal. Air Chief Marshal
not_related.