lineInP11 = r associatedLineInP11(subsLine,relPfaf)
Given the row matrix subsLine where the $a$-variables have been replaced by linear combinations of $x_0,x_1$ parametrizing a line in $\mathbb{P}^{11}$, the procedure computes the corresponding line as a variety of $\mathbb{P}^{11}$.
The object associatedLineInP11 is a method function.