premise: Children are playing and swimming in a boy of water with a footbridge in the background.
hypothesis: Old people are swimming.
explanation_1: Children are young. There is several years difference between children and old people.
explanation_2: Old people are not children
explanation_3: If they are children then they are not old people.
premise_logic: exists e1 e2 x1 x2 x3 x4 x5 x6.(n_background(x4) & in(e2,x5) & of(x5,x6) & n_water(x6) & n_boy(x5) & with(e2,x3) & in(x3,x4) & n_footbridge(x3) & Actor(e2,x2) & v_swim(e2) & n_child(x2) & Actor(e1,x1) & v_play(e1) & n_child(x1))
hypothesis_logic: exists e1 s1 x1.(Actor(e1,x1) & v_swim(e1) & n_people(x1) & a_old(s1) & Theme(s1,x1))
premise_sim: exists e1 e2 x1 x2 x3 x4 x5 x6.(with(e2,x3) & v_swim(e2) & v_play(e1) & of(x5,x6) & n_water(x6) & n_footbridge(x3) & n_child(x2) & n_child(x1) & n_boy(x5) & n_background(x4) & in(x3,x4) & in(e2,x5) & Actor(e2,x2) & Actor(e1,x1))
hypothesis_sim: exists e1 s1 x1.(v_swim(e1) & n_people(x1) & a_old(s1) & Theme(s1,x1) & Actor(e1,x1))