With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Grunge became commercially successful due in part to Pearl Jam's Ten and Soundgarden's Superunknown.
text_B: In 2010 , Arsen Cigars was launched by Arsen Gasparian , a former diplomat and journalist who came to the cigar industry originally as a publisher of the Russian Cigar Magazine , Hecho A Mano .
not_related.