All roles that have a common parent based on the Inheritance and Subframe relations will share a set of features in common.
for each base feature φ which is conjoined with the role r in the baseline model (φ ∧ "role=r"), and for each parent r ′ of r, we add a new copy of the feature that is the base feature conjoined with the parent role, (φ ∧"parent_role=r ′ ").