A white dog has its head on the ground.
A dog bumps his head on the ground and is severely injured.
Just because a white dog has its head on the ground does not imply that it  bumps his head on the ground and is severely injured.
exists e1 s1 x1 x2 x3.(n_ground(x3) & on(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & n_head(x2) & of(x2,x1) & n_thing(x1) & n_dog(x1) & a_white(s1) & Theme(s1,x1))
exists e1 e2 s1 x1 x2 x3 x4.(n_ground(x3) & a_severely(s1) & Manner(e2,s1) & Theme(e2,x4) & v_injure(e2) & n_dog(x4) & on(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_bump(e1) & n_head(x2) & of(x2,x1) & n_male(x1) & n_dog(x1))