With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Home Alone does not feature Christmas.
text_B: A variety of diagonal arguments are used in mathematics .. mathematics. mathematics. `` Cantor 's diagonal argument '' was the earliest .. Cantor 's diagonal argument. Cantor 's theorem. Halting problem. Halting problem. Halting problem. Diagonal lemma. Diagonal lemma. Diagonal lemma. Category  : Arguments
not_related.