Fig. 1

A graph structure, representing relationships between individuals represented at the nodes. The lines connecting each individual on the graph are edges. Each edge represents a particular kind of relationship between two individuals. This graph represents a number of important relationships between the various individuals; these relationships would most likely be of interest to a working group for collaborators with knowledge of a certain subject area, familiarity with a shared body of experimental techniques, and, perhaps most importantly, a high level of comfort working with one another. The graph shows an academic lineage, connecting university faculty who have worked together previously with two generations of their students, who have expanded and strengthened the connections among the group