premise: A group is gathered outside holding flowers.
hypothesis: Their hands are holding something
explanation_1: Their is a plural pronoun which takes the place of A group.  Flowers are something.
explanation_2: Each group of people are holding something in their hands, like flowers.
explanation_3: Holding flowers are holding something.
premise_logic: exists e2 e1 x1 x2.(outside(e1,x2) & n_flower(x2) & Actor(e2,x2) & v_hold(e2) & Theme(e1,x1) & v_gather(e1) & n_group(x1))
hypothesis_logic: exists e1 x1 x2.(Theme(e1,x1) & Actor(e1,x2) & v_hold(e1) & n_thing(x1) & n_thing(x1) & n_hand(x2) & of(x2,x1))