The realization space is
  [1   1   0   x1^2 - 2*x1 + 1   0   1   1                  0   x1^2 - 2*x1 + 1   x1 - 1      x1 - 1]
  [1   0   1                x1   0   1   0           2*x1 - 1                x1      -x1         -x1]
  [0   0   0                 0   1   1   1   -x1^2 + 2*x1 - 1        -x1^2 + x1      -x1   x1^2 - x1]
in the multivariate polynomial ring in 1 variable over ZZ
within the vanishing set of the ideal
Ideal (-4*x1^9 + 26*x1^8 - 68*x1^7 + 94*x1^6 - 75*x1^5 + 35*x1^4 - 9*x1^3 + x1^2)
avoiding the zero loci of the polynomials
RingElem[2*x1 - 1, x1, x1 - 1, x1^2 - 3*x1 + 1, x1^2 - x1 + 1, x1^2 + x1 - 1, x1^3 + 2*x1^2 - 3*x1 + 1, 3*x1 - 1, x1^3 - 2*x1^2 + 3*x1 - 1, 3*x1^2 - 3*x1 + 1, 2*x1^2 - 4*x1 + 1, x1^2 - 4*x1 + 2]