the parents "inherit" the alignment from their children.
this does not mean that the direction of entailment needs to be the same; in Figure 7, "Super PACs" entails "campaign funding" (t 1 s 1 t 2 ), while "X criticizes Y on Z" entails "X disagrees with Y over Z" (π(t 2 , s 2 ) s 2 π(t 1 , s 1 )).