premise: Blond woman singing in front of a band.
hypothesis: A man is singing acapello.
explanation_1: acapello means voice only, no band, therefore you cannot sing in front of a band and not have a band, ie acapello - they are contradictory states of being
premise_logic: exists e1 x1 x2 x3 x4 x5.(a_topic(x1) & in(e1,x4) & of(x4,x5) & n_band(x5) & n_front(x4) & Actor(e1,x3) & v_sing(e1) & (x1 = x3) & n_woman(x1) & (x1 = x2) & ne_nam_blond(x2))
hypothesis_logic: exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_sing(e1) & n_acapello(x2) & n_man(x1))
premise_sim: exists e1 x1 x2 x3 x4 x5.(v_sing(e1) & of(x4,x5) & ne_nam_blond(x2) & n_woman(x1) & n_front(x4) & n_band(x5) & in(e1,x4) & a_topic(x1) & Actor(e1,x3) & (x1 = x3) & (x1 = x2))
hypothesis_sim: exists e1 x1 x2.(v_sing(e1) & n_man(x1) & n_acapello(x2) & Theme(e1,x2) & Actor(e1,x1))