The realization space is
  [1   0   1              x2   0   1    0   x2 - 2              x2         1         1]
  [0   1   1   -x1*x2 + 2*x1   0   0    1   x2 - 2   -x1*x2 + 2*x1   -x2 + 2   -x2 + 2]
  [0   0   0               0   1   1   -1       -1           x1*x2         1        x2]
in the multivariate polynomial ring in 2 variables over ZZ
avoiding the zero loci of the polynomials
RingElem[x2 - 2, x2 - 1, x1 - x2, x1, 2, x1*x2 - x1 + x2, x1*x2 - 2*x1 + 2*x2, x2, x1*x2 - 2*x1 + x2, x1 - 1, x1*x2^2 - 2*x1*x2 + 2*x1 - x2, 2*x1 + x2^2 - 3*x2, x2 - 3, x1*x2 - 2*x1 - x2^2 + 3*x2, x1*x2 - 2*x1 + 1, 2*x1*x2 - 4*x1 - x2^2 + 3*x2, 2*x1 - x2, x1*x2^2 - 4*x1*x2 + 4*x1 + x2^2 - 3*x2]