The grass in the field is short.
The field is outside.
The grass in field outside is short.  A field is outside.
exists s1 x1 x2.(n_field(x2) & n_grass(x1) & Theme(s1,x1) & a_short(s1) & in(x1,x2))
exists s1 x1.(n_field(x1) & Theme(s1,x1) & a_outside(s1))