twGiven a bipartite affiliation graph that shows the membership of people in different social foci, the corresponding projected graph has just people as the nodes, with two nodes connected when they have a focus in common. Give an example of two different affiliation networks - on the same set of people, but with different numbers of foci - so that the projected graphs from these two different affiliation networks are the same.

This is the Network Structure problem, can someone able to help me?