A man in a red jacket and sunglasses is snowboarding down a snowy mountain.
A man is skiing down the mountain.
The man cannot be skiing and snowboarding down the mountain at the same time.
exists e1 s1 s2 s3 x1 x2 x3 x4 x5.(a_down(s3) & Manner(e1,s3) & Theme(e1,x5) & Actor(e1,x1) & v_snowboard(e1) & n_mountain(x5) & a_snowy(s2) & Theme(s2,x5) & in(x1,x2) & subset_of(x4,x2) & n_sunglass(x4) & subset_of(x3,x2) & n_jacket(x3) & a_red(s1) & Theme(s1,x3) & n_man(x1))
exists e1 s1 x1 x2.(n_mountain(x2) & a_down(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_ski(e1) & n_man(x1))