Two boots are on two skis moving very fast.
A person is skiing.
Two boots have to be occupied by a person to be moving
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))
exists p1 x1.(exists x2.((x1 = x2) & n_skiing(x2)) & n_person(x1))