With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Birds sometimes get shingles.
text_B: Jan van Nickelen -LRB- 1655 , Haarlem -- 1721 , Kassel -RRB- , was a Dutch Golden Age painter .. Haarlem. Haarlem. Kassel. Kassel. Dutch Golden Age. Dutch Golden Age
not_related.