Person snowboarding down a snow covered slope.
He  was  playing  in  the  snow with the  snowboard.
Snowboarding does not necessarily mean playing in the snow.
exists e1 e2 s1 x1 x2 x3.(ne_nam_person(x1) & a_down(s1) & Manner(e2,s1) & Theme(e2,x2) & Actor(e2,x1) & v_snowboard(e2) & n_slope(x2) & Theme(e1,x2) & v_cover(e1) & of(x2,x3) & n_snow(x3))
exists e1 x1 x2 x3.(n_snowboard(x3) & n_snow(x2) & n_male(x1) & with(e1,x3) & in(e1,x2) & Actor(e1,x1) & v_play(e1))