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