With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Nina Simone was an American.
text_B: Den tankande brevbararen -LRB- `` The Thinking Postman '' -RRB- was the Sveriges Television 's Christmas calendar and Sveriges Radio 's Christmas Calendar in 1963 .. The radio version was called Brevbararen vid Radiogrand -LRB- `` The Postman at Radio Alley '' -RRB- .
not_related.