With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Lee Min-ho's first leading role was in Gangnam Blues.
text_B: Three referendums were held in Switzerland in 1882 .. Switzerland. Switzerland. Two were held on 30 July on copyright law and measures against epidemics , both of which were rejected .. copyright. copyright. epidemics. epidemics. The third was held on 26 November on executing article 27 of the federal constitution , and was rejected by 64.9 % of voters .. federal constitution. Swiss Federal Constitution
not_related.