With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Macbeth won the Grand Prix at the 25th Cannes Film Festival.
text_B: The 25th Cannes Film Festival was held on May 4 -- 19 , 1972 .. Cannes. Cannes. Cannes Film Festival. Cannes Film Festival. 1972 in film. The Palme d'Or went to the La classe operaia va in paradiso by Elio Petri and Il Caso Mattei by Francesco Rosi .. Palme d'Or. Palme d'Or. La classe operaia va in paradiso. The Working Class Goes to Heaven. Il Caso Mattei. The Mattei Affair. Elio Petri. Elio Petri. Francesco Rosi. Francesco Rosi. The festival opened with Malpertuis , directed by Harry Kumel and closed with Frenzy , directed by Alfred Hitchcock .. Malpertuis. Malpertuis ( film ). Frenzy. Frenzy. Harry Kumel. Harry Kumel. Alfred Hitchcock. Alfred Hitchcock
related.