With no explanation, label text_A→text_B with either "not-entailed" or "entailed".
text_A: In a major regional shift reflecting the newly strengthened position of Karzai , Iran , Russia and India which have traditionally backed the Tajik dominated former Northern Alliance made strenuous efforts to convince presidential candidate Younis Qanooni to strike a deal with Karzai before the elections and not to oppose Karzai .
text_B: The backing did not happen
not-entailed.