With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Idris Elba was in Thor: The Dark World.
text_B: Also see List of sibling groups.For a complete list of pairs , see Lists of pairs .. List of sibling groups. List of sibling groups. Lists of pairs. Lists of pairs. For a complete list of twins , see List of twins.This list includes certain twins , provided said twins have at least one additional older or younger sibling.Siblings are arranged alphabetically by last name ; listed from oldest to youngest . ''. List of twins. List of twins
not_related.