A skier wearing a blue jacket and helmet is skiing down a hill.
the skier is sitting down
A skier skiing down a hill cannot be sitting down the same time.
exists e1 e2 s1 s2 x1 x2 x3 x4 x5 x6.(a_down(s2) & Manner(e2,s2) & Theme(e2,x6) & Actor(e2,x1) & v_ski(e2) & n_hill(x6) & Theme(e1,x3) & Actor(e1,x2) & v_wear(e1) & n_helmet(x5) & n_jacket(x4) & subset_of(x5,x3) & subset_of(x4,x3) & a_blue(s1) & Theme(s1,x3) & (x1 = x2) & n_skier(x1))
exists e1 s1 x1.(n_skier(x1) & a_down(s1) & Manner(e1,s1) & Actor(e1,x1) & v_sit(e1))