Snowboarders sitting in the snow while skiers take the hill.
snowboarders are sitting.
One may be sitting on snow.
exists e1 p1 x1 x2 x3 x5.(n_hill(x5) & n_snow(x3) & a_topic(x1) & exists e2 x4.(Theme(e2,x5) & Actor(e2,x4) & v_take(e2) & n_skier(x4)) & while(e1,p1) & in(e1,x3) & Actor(e1,x2) & v_sit(e1) & (x1 = x2) & n_snowboarder(x1))
exists e1 x1.(Actor(e1,x1) & v_sit(e1) & n_snowboarder(x1))