A boy playing in a mud puddle.
The boy is very dirty.
Not all boys get dirty when playing with mud.
exists x1 x2 x3 x4.(a_topic(x1) & in(x1,x3) & n_puddle(x3) & of(x3,x4) & n_mud(x4) & n_playing(x1) & of(x1,x2) & n_boy(x2))
exists s1 x1.(n_boy(x1) & r_very(s1) & Theme(s1,x1) & a_dirty(s1))