The realization space is
  [1   0   1   x1 - 2   0   1    1    0        1             x1 - 2]
  [0   1   1       -1   0   0    0    1        1   -x1^2 + 2*x1 - 1]
  [0   0   0        0   1   1   x1   -1   x1 - 1        x1^2 - 2*x1]
in the multivariate polynomial ring in 1 variable over ZZ
within the vanishing set of the ideal
Ideal (x1^5 - 6*x1^4 + 13*x1^3 - 13*x1^2 + 7*x1 - 2)
avoiding the zero loci of the polynomials
RingElem[x1^3 - 2*x1^2 + x1 - 1, x1^2 - x1 - 1, x1 - 1, x1, x1 - 2]