premise: A band is playing on a stage while a lady sings.
hypothesis: A woman sings.
explanation_1: A lady sings and a woman sings are equivalent.
explanation_2: Lady and woman are synonyms.
explanation_3: both sentences contain a woman/ lady who sings
premise_logic: exists e1 x1 x2 x3 x4.(while(e1,x3) & n_sing(x3) & of(x3,x4) & n_lady(x4) & on(e1,x2) & n_stage(x2) & Actor(e1,x1) & v_play(e1) & n_band(x1))
hypothesis_logic: exists x1 x2.(a_topic(x1) & n_sing(x1) & of(x1,x2) & n_woman(x2))