A boy in black winter clothes sits on an inflated sled by a mound of snow.
A boy builds a snowman in the winter.
If the boy builds a snowman, he cannot be on a a sled.
exists e1 s1 s2 x1 x2 x3 x4 x5 x6.(by(e1,x5) & of(x5,x6) & n_snow(x6) & n_mound(x5) & on(e1,x4) & n_sled(x4) & a_inflated(s2) & Theme(s2,x4) & Actor(e1,x1) & v_sit(e1) & in(x1,x2) & n_clothes(x2) & of(x2,x3) & n_winter(x3) & a_black(s1) & Theme(s1,x2) & n_boy(x1))
exists e1 x1 x2 x3.(n_winter(x3) & in(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_build(e1) & n_snowman(x2) & n_boy(x1))