premise: A group of children walking on a trail.
hypothesis: Children are walking.
explanation_1: A common place to walk is a trail.
explanation_2: To be walking on a trail shows that the children are walking.
explanation_3: Group of children are children, and walking on a trail is a form of walking.
premise_logic: exists e1 x1 x2 x3 x4.(a_topic(x1) & of(x1,x2) & on(e1,x4) & n_trail(x4) & Actor(e1,x3) & v_walk(e1) & (x2 = x3) & n_child(x2) & n_group(x1))
hypothesis_logic: exists e1 x1.(Actor(e1,x1) & v_walk(e1) & n_child(x1))