With no explanation, label text_A→text_B with either "not-entailed" or "entailed".
text_A: Polish President Lech Kaczynski has invited his Russian counterpart Dmitri Medvedev to this month 's 65th anniversary of the liberation of the Nazi death camp , Auschwitz .
text_B: Lech Kaczynski is a day of the week
not-entailed.