premise: A choir of youths are singing.
hypothesis: they are singing in a christmas program
explanation_1: Just because they are singing does not mean it is in a christmas program.
explanation_2: Although they are singing, it does not mean they are singing in a christmas program.
explanation_3: Singing does not have to be done in a Christmas program.
premise_logic: exists e1 x1 x2.(Actor(e1,x1) & v_sing(e1) & of(x1,x2) & n_youth(x2) & n_choir(x1))
hypothesis_logic: exists e1 x1 x2.(in(e1,x1) & n_program(x1) & of(x1,x2) & n_christmas(x2) & Actor(e1,x1) & v_sing(e1) & n_thing(x1))
premise_sim: exists e1 x1 x2.(v_sing(e1) & of(x1,x2) & n_youth(x2) & n_choir(x1) & Actor(e1,x1))
hypothesis_sim: exists e1 x1 x2.(v_sing(e1) & of(x1,x2) & n_thing(x1) & n_program(x1) & n_christmas(x2) & in(e1,x1) & Actor(e1,x1))