The grass in the field is short.
The field is covered in long rows of corn.
One can not have a field of grass and corn simultaneously.
exists s1 x1 x2.(n_field(x2) & n_grass(x1) & Theme(s1,x1) & a_short(s1) & in(x1,x2))
exists e1 s1 x1 x2 x3.(n_field(x1) & in(e1,x2) & of(x2,x3) & n_corn(x3) & n_row(x2) & a_long(s1) & Theme(s1,x2) & Theme(e1,x1) & v_cover(e1))