premise: A black dog is chasing a ball on a green grass.
hypothesis: A black dog is running outside.
explanation_1: You are running when you are chasing something.   Green grass are usually found outside.
explanation_2: Chasing implies running and green grass can be only outside.
explanation_3: Chasing on the green grass would be equivalent to running outside.
premise_logic: exists e1 s1 s2 x1 x2 x3.(on(e1,x3) & n_grass(x3) & a_green(s2) & Theme(s2,x3) & Theme(e1,x2) & Actor(e1,x1) & v_chase(e1) & n_ball(x2) & n_dog(x1) & a_black(s1) & Theme(s1,x1))
hypothesis_logic: exists e1 s1 s2 x1.(a_outside(s2) & Manner(e1,s2) & Actor(e1,x1) & v_run(e1) & n_dog(x1) & a_black(s1) & Theme(s1,x1))