With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Demi Lovato is an advocate for the LGBT community.
text_B: Rovere may refer to. Italian noble House of della Rovere or any of its members. House of della Rovere. House of della Rovere. Rovere Veronese , Italian municipality. Rovere Veronese. Rovere Veronese. Rovere della Luna , Italian municipality. Rovere della Luna. Rovere della Luna. Lucrezia Lante della Rovere , Italian actress. Lucrezia Lante della Rovere. Lucrezia Lante della Rovere. Richard Rovere , American journalist. Richard Rovere. Richard Rovere. Gino Rovere. Gino Rovere. Gino Rovere
not_related.