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