finding the node with specific parents (intersection)

[vigilancetech-com]

Is there a way to identify a node that has a couple or more parents in common?

For example, say I'm trying to do GTD and I have a certain place for something to be done, and a certain person who's supposed to do it, so both these would be the parents of those things. Is there a function that would allow me to find the intersection of those parents without having to go into one of them and then bringing up each child individually to see if the other parent was one of it's parents?

If not, this would be a good feature IMO.

[Kungsgeten]

Sorry for the very late response. Aren't you describing sibling relationships, which you can see in org-brain-visualize?