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