premise: A person on a brown horse in a prairie in front of tall mountains.
hypothesis: A person is riding on a brown horse in the midst of a prairie shadowed by mountains
explanation_1: If a person is on a horse, they are riding it.
explanation_2: The person must be on the brown horse to be riding it.
explanation_3: On a brown horse is a rephrasing of riding on a brown horse, and tall mountains are a type of mountains.
premise_logic: exists s1 s2 x1 x2 x3 x4 x5.(a_topic(x1) & on(x1,x2) & in(x2,x3) & in(x3,x4) & of(x4,x5) & n_mountain(x5) & a_tall(s2) & Theme(s2,x5) & n_front(x4) & n_prairie(x3) & n_horse(x2) & a_brown(s1) & Theme(s1,x2) & n_person(x1))
hypothesis_logic: exists e2 e1 s1 x1 x2 x3 x4 x5 x6.(n_midst(x3) & in(e1,x3) & of(x3,x4) & Actor(e2,x6) & n_mountain(x6) & Theme(e2,x5) & v_shadow(e2) & (x4 = x5) & n_prairie(x4) & on(e1,x2) & n_horse(x2) & a_brown(s1) & Theme(s1,x2) & Actor(e1,x1) & v_ride(e1) & n_person(x1))