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