With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: The Hobbit films starred William James Nesbitt.
text_B: The 1946 Rene le Begue Cup was a Grand Prix motor race held in Paris on 6 June 1946 .. Paris. Paris. Grand Prix. Grand Prix motor racing. motor race. motor race
not_related.