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