premise: Girls sit in costumes.
hypothesis: The girls are performing in a play.
explanation_1: The girls' activity could be something other than performing.  The girls could be at an event other than a play.
premise_logic: exists e1 x1 x2.(in(e1,x2) & n_costume(x2) & Actor(e1,x1) & v_sit(e1) & n_girl(x1))
hypothesis_logic: exists e1 x1 x2.(n_girl(x1) & in(e1,x2) & n_play(x2) & Actor(e1,x1) & v_perform(e1))
premise_sim: exists e1 x1 x2.(v_sit(e1) & n_girl(x1) & n_costume(x2) & in(e1,x2) & Actor(e1,x1))
hypothesis_sim: exists e1 x1 x2.(v_perform(e1) & n_play(x2) & n_girl(x1) & in(e1,x2) & Actor(e1,x1))