With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Akbar was a patron of something.
text_B: The Jackal-class gunvessel -LRB- alternatively spelled Jackall -RRB- was a class of two second-class iron paddle gunvessels built for the Royal Navy in the mid 1840s .. gunvessel. gunvessel. Royal Navy. Royal Navy. They served in the Mediterranean and South Atlantic , and latterly on fishery protection duties off Scotland .
not_related.