Example data for the Lab4IQM Graph Theory module, read as "graphs:<file>".

karate.csv      Zachary's karate club (34 members, 78 friendships), from W. W. Zachary,
                "An information flow model for conflict and fission in small groups",
                J. Anthropological Research 33 (1977) 452-473; members numbered 1-34
                (the same graph as networkx.karate_club_graph(), whose nodes are 0-33).
florentine.csv  Marriage ties between Renaissance Florentine families (15 families, 20 ties),
                from J. F. Padgett and C. K. Ansell, "Robust action and the rise of the
                Medici, 1400-1434", Am. J. Sociology 98 (1993) 1259-1319 (the same graph as
                networkx.florentine_families_graph()).
Both are edge lists with a header source,target.
