A man is skiing down a snowy hill while he casts a long shadow.
The man is snowboarding in a half pipe.
The man is skiing, he cannot be snowboarding at the same time.
exists e1 p1 s1 s2 x1 x2.(exists e2 s3 x3.(Theme(e2,x3) & Actor(e2,x1) & v_cast(e2) & n_shadow(x3) & a_long(s3) & Theme(s3,x3)) & n_male(x1) & while(e1,p1) & a_down(s2) & Manner(e1,s2) & Theme(e1,x2) & Actor(e1,x1) & v_ski(e1) & n_hill(x2) & a_snowy(s1) & Theme(s1,x2) & n_man(x1))
exists e1 x1 x2 x3.(n_man(x1) & in(e1,x2) & n_pipe(x2) & of(x2,x3) & n_half(x3) & Actor(e1,x1) & v_snowboard(e1))