With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Newcastle United F.C. was the victor of an annual knockout football competition.
text_B: Bourne are a series of three novels by Robert Ludlum based on the fictional spy Jason Bourne .. Robert Ludlum. Robert Ludlum. Jason Bourne. Jason Bourne. The series has since been further extended by Eric Van Lustbader after the death of Robert Ludlum .. Robert Ludlum. Robert Ludlum. Eric Van Lustbader. Eric Van Lustbader
not_related.