Five children are playing in the snow.
Children are out on the lake.
A lake does not contain snow.
exists e1 x1 x2.(n_snow(x2) & in(e1,x2) & Actor(e1,x1) & v_play(e1) & n_child(x1) & card_eq_5(x1))
exists p1 s1 x1 x2.(n_lake(x2) & a_out(s1) & Manner(p1,s1) & on(x1,x2) & n_child(x1))