With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Darius Rucker founded a company along with Mark Bryan, Jim Sonefeld and Dean Felber.
text_B: '' '' is a short tenor aria -LRB- or more specifically , a cabaletta -RRB- sung by Manrico in act 3 , scene 2 , of Giuseppe Verdi 's opera Il trovatore .. tenor. tenor. aria. aria. cabaletta. cabaletta. Giuseppe Verdi. Giuseppe Verdi. Il trovatore. Il trovatore. It is the last number of the act .
not_related.