A man skis past another man displaying paintings in the snow.
A man is snowboarding past another man.
One can't be skiing and snowboarding simultaneously.
exists e1 e2 s1 x1 x2 x3 x4 x5.(n_snow(x5) & for(e2,s1) & Theme(s1,x1) & a_past(s1) & Theme(e2,x2) & Actor(e2,x1) & v_ski(e2) & in(e1,x5) & Theme(e1,x4) & Actor(e1,x3) & v_display(e1) & n_painting(x4) & (x2 = x3) & n_man(x2) & -(x2 = x1) & n_man(x1) & n_man(x1))
exists e1 x1 x2.(past(e1,x2) & n_man(x2) & -(x2 = x1) & n_man(x1) & n_man(x1) & Actor(e1,x1) & v_snowboard(e1))