With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Daniel Radcliffe appeared in a 2013 biographical film.
text_B: Scottish Society in the High Middle Ages pertains to Scottish society roughly between 900 and 1286 , a period roughly corresponding to the general historical era known as the High Middle Ages .. Scottish society. Scottish society. High Middle Ages. Scotland in the High Middle Ages
not_related.