With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Michelle Obama was a First Lady for eight years.
text_B: Per Øystein Sørensen -LRB- born December 13 , 1961 -RRB- is a Norwegian singer and songwriter , best known as the vocalist of the new wave / synthpop band Fra Lippo Lippi .. songwriter. songwriter. Fra Lippo Lippi. Fra Lippo Lippi ( band ). Norwegian. Norway. vocalist. vocalist. new wave. New wave music. synthpop. synthpop
not_related.