A black dog is running across a grassy field by a tall fence.
There is a fence by the field.
If there is a field by a tall fence then there is a fence by the field.
exists e1 s1 s2 s3 x1 x2 x3.(by(e1,x3) & n_fence(x3) & a_tall(s3) & Theme(s3,x3) & across(e1,x2) & n_field(x2) & a_grassy(s2) & Theme(s2,x2) & Actor(e1,x1) & v_run(e1) & n_dog(x1) & a_black(s1) & Theme(s1,x1))
exists p1 x1 x3.(n_field(x3) & exists x2.((x1 = x2) & by(x2,x3) & n_fence(x2)))