premise: girl with helmet riding a brown horse
hypothesis: The girl is on top of a horse.
explanation_1: to be riding a horse she is on top
explanation_2: To ride a horse, one must be on top of it.
explanation_3: both sentences have a girl riding a horse
premise_logic: exists e1 s1 x1 x2 x3 x4.(a_topic(x1) & with(x1,x2) & Theme(e1,x4) & Actor(e1,x3) & v_ride(e1) & n_horse(x4) & a_brown(s1) & Theme(s1,x4) & (x2 = x3) & n_helmet(x2) & n_girl(x1))
hypothesis_logic: exists p1 x1.(n_girl(x1) & exists x2 x3.(on(x1,x2) & of(x2,x3) & n_horse(x3) & n_top(x2)))