With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Captain America had a movie serial in 1944, titled Captain America.
text_B: Capital Economics is an economic research consultancy based in London .. London. London. Economics. Economics. In 2012 it won the Wolfson Economics Prize for the best proposal on how the Eurozone could be safely dismantled .. Economics. Economics. Wolfson Economics Prize. Wolfson Economics Prize
not_related.