premise: Two boots are on two skis moving very fast.
hypothesis: A person is skiing.
explanation_1: Two boots have to be occupied by a person to be moving
premise_logic: exists e1 p1 s1 x1.(for(p1,e1) & r_very(e1) & a_fast(s1) & Manner(e1,s1) & Actor(e1,x1) & v_move(e1) & exists x2.(on(x1,x2) & n_ski(x2) & card_eq_2(x2)) & n_boot(x1) & card_eq_2(x1))
hypothesis_logic: exists p1 x1.(exists x2.((x1 = x2) & n_skiing(x2)) & n_person(x1))
premise_sim: exists e1 p1 s1 x1.(v_move(e1) & r_very(e1) & n_boot(x1) & for(p1,e1) & exists x2.(on(x1,x2) & n_ski(x2) & card_eq_2(x2)) & card_eq_2(x1) & a_fast(s1) & Manner(e1,s1) & Actor(e1,x1))
hypothesis_sim: exists x1.(n_person(x1) & exists x2.(n_skiing(x2) & (x1 = x2)))