With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Bermuda is a Caribbean island.
text_B: Robert Windsor-Clive may refer to  :. Robert Windsor-Clive -LRB- MP -RRB- -LRB- 1824-1859 -RRB- , MP. Robert Windsor-Clive , 1st Earl of Plymouth -LRB- 1857-1923 -RRB- , politician , son of the above
not_related.