premise: A skier goes down a hill with a mountain as a backdrop.
hypothesis: A skier going down a hill.
explanation_1: A mountain is the backdrop as a skier goes down hill.
explanation_2: Goes is a form of going.
explanation_3: "A skier going down a hill" is a rephrasing of "a skier goes down a hill."
premise_logic: exists e1 x1 x2 x3 x4.(with(e1,x3) & as(x3,x4) & n_backdrop(x4) & n_mountain(x3) & down(e1,x2) & n_hill(x2) & Actor(e1,x1) & v_go(e1) & n_skier(x1))
hypothesis_logic: exists e1 s1 x1 x2 x3.(a_topic(x1) & a_down(s1) & Manner(e1,s1) & Theme(e1,x3) & Actor(e1,x2) & v_go(e1) & n_hill(x3) & (x1 = x2) & n_skier(x1))