39.1 Random Graph
https://en.wikipedia.org/wiki/Category:Random_graphs
https://en.wikipedia.org/wiki/Autologistic_actor_attribute_models
https://en.wikipedia.org/wiki/Iconography_of_correlations
https://en.wikipedia.org/wiki/Bayesian_network
https://en.wikipedia.org/wiki/PageRank https://en.wikipedia.org/wiki/SimRank https://en.wikipedia.org/wiki/Statistical_semantics